In the world of market research, not all studies are created equal. Whether you’re launching a new product, refining your marketing strategy, or trying to understand shifting consumer behavior, choosing the right research approach can make the difference between actionable insights and wasted resources. This comprehensive guide explores the three fundamental types of market research — Exploratory, Descriptive, and Causal — breaking down their unique purposes, methodologies, strengths, and limitations. By understanding how these approaches differ and when to use each one, marketers and business leaders can design smarter research projects, ask better questions, and ultimately make more confident, data-driven decisions that drive real business growth.

Market research is the systematic process of gathering, recording, and analysing data about markets, consumers, competitors, and industries to support decision-making. For traders and business professionals alike, it is the foundation upon which profitable strategies are built.

Now, I know what some of you are thinking: “I don’t need research. I have vibes.”

Bro. Let me tell you something. The market does not care about your vibes. The market ate your vibes for breakfast, charged you commission, and shorted the vibes on the way down. Vibes are not a strategy.

Market research gives you something far more powerful than vibes: evidence. And when it comes to evidence-based decision-making, there are three distinct research designs that underpin virtually every serious commercial, financial, and academic investigation:

  1. Exploratory Research — the “what is going on here?” phase
  2. Descriptive Research — the “what does this market look like?” phase
  3. Causal Research — the “why did that happen, and can I replicate it?” phase

Each has a distinct purpose, methodology, and output. They are not interchangeable — and confusing them is like using a hammer to perform surgery. Technically an action, absolutely a disaster.


Part One: Exploratory Market Research

What Is Exploratory Research?

Exploratory research is the open-ended, hypothesis-generating first step in the research process. It is deployed when you don’t yet know enough about a problem to ask the right questions — when all you know is that something is happening and you need to figure out what.

Think of it as the reconnaissance mission before the battle. You’re not committing resources. You’re not firing any shots. You’re just out there asking, “Okay, what are we actually dealing with?”

According to Sreejesh et al. (2014), in their seminal work Business Research Design: Exploratory, Descriptive and Causal Designs, exploratory studies are conducted for three primary reasons: to analyse a problem situation, to evaluate alternatives, and to discover new ideas. That’s it. Not to prove anything. Not to close anything. Just to discover.

The Marketing Research Association further confirms that exploratory research serves as an essential first step when entering new markets, developing innovations, or facing ambiguous marketing challenges — situations where the trader equivalent is staring at a chart and going, “I genuinely don’t know if this is a reversal or if I’m just broke.”

Methods Used in Exploratory Research

Exploratory research is inherently qualitative and flexible. Common methods include:

  • Focus groups — Small groups of 6–10 people discussing a topic openly. Picture asking six traders what they think about a new trading platform. Half of them will argue. One will leave. Two will be on their phones. But you’ll get data.
  • In-depth interviews — One-on-one conversations designed to uncover motivations, fears, and behaviours beneath the surface.
  • Literature reviews — Reviewing existing academic papers, industry reports, and books to understand what’s already known about the topic.
  • Expert consultations — Sitting down with someone who actually knows what they’re talking about. Revolutionary, I know.
  • Secondary data analysis — Using existing datasets to begin pattern recognition before committing to primary data collection.

The key characteristic of all these methods is flexibility. As conditions and findings evolve, so can the approach. There’s no rigid script. You follow the thread wherever it leads.

The Limitations — And Why That’s Okay

Exploratory research does not give you definitive answers. It gives you better questions. And if you’re a trader who’s been running the same playbook for three years with diminishing returns, getting better questions might be exactly what you need.

The limitation is that exploratory research results cannot be statistically generalised. You can’t say “I talked to seven traders and therefore ALL traders feel this way.” That would be like me having one bad meal at a restaurant and declaring the entire cuisine dead. (Actually, I’ve done that. Moving on.)

This is why exploratory research is almost always followed by descriptive or causal research. It opens the door; the other two walk through it.

Case Study: Netflix Entering the Gaming Market

When Netflix was considering entering the mobile gaming market in 2021, the exploratory phase involved extensive qualitative research — focus groups, behavioural interviews, and secondary data reviews — to understand how subscribers perceived gaming, what genres appealed to them, and whether they’d actually use a gaming feature within an existing streaming app.

This exploratory work did not tell Netflix how many subscribers would use games (that’s descriptive) or whether gaming would increase retention (that’s causal). It told them what questions to ask next. Netflix used that intelligence to structure its subsequent research and ultimately launched its gaming feature, which as of 2024 has expanded to over 100 games. The exploratory phase was the whole reason they didn’t walk in there completely blind.


Part Two: Descriptive Market Research

What Is Descriptive Research?

If exploratory research is the reconnaissance mission, descriptive research is drawing the map. You now know what you’re looking at. Descriptive research quantifies it, catalogues it, and gives you a statistically reliable picture of a market, population, or phenomenon.

Descriptive research answers the “what, who, when, and where” questions. It does not answer why. That’s causal research’s job, and we’ll get there. For now, descriptive research is about establishing facts.

The Advertising Research Foundation notes that descriptive research provides the empirical foundation for marketing decisions by establishing current market conditions. In trading terms: before I take a position, I want to describe the landscape. What’s the market cap? Who are the dominant players? What’s the trading volume over the past 90 days? What does the sentiment data look like? That’s all descriptive work.

And look — I know some of y’all think surveys are boring. I once had a trader tell me he didn’t believe in surveys. He also lost 40% of his portfolio on a tip from a guy in a Discord server named “CryptoKing88.” So let’s respect the survey.

Methods Used in Descriptive Research

Descriptive research uses structured, quantitative methods designed for statistical analysis:

  • Surveys and questionnaires — The backbone of descriptive market research. Standardised questions, large sample sizes, statistically analysable outputs.
  • Observational studies — Watching consumer or market behaviour without intervening. If you’ve ever looked at order flow data to see what institutional players are doing, congratulations, you’ve done observational descriptive research.
  • Panel studies — Tracking the same respondents over time to observe changes in attitudes or behaviours.
  • Secondary data analysis — Census data, industry reports, economic data, and proprietary market databases.
  • Cross-sectional studies — A snapshot of a market at a specific point in time.

The defining feature of descriptive research is structure. Questions are predetermined. The sample is carefully selected. The output is designed to be representative and generalisable. No winging it.

The Role of Descriptive Research in Trading and Finance

In the context of financial markets, descriptive research is everywhere — you just might not have recognised it by name. Every time you look at a market sizing report, a competitive landscape analysis, or a demographic breakdown of a customer segment, that’s descriptive research in action.

Malhotra (2019), in Marketing Research: An Applied Orientation (7th ed., Pearson), explicitly frames descriptive research as the quantitative complement to qualitative exploration — emphasising that without solid descriptive data, causal experiments have no baseline to measure against. You can’t know if something changed if you never documented where you started.

For traders, this is the equivalent of marking your entry level. If you don’t know where you entered, how do you know if you’re winning?

Descriptive Research and Statistical Validity

Here’s where descriptive research gets serious. The whole point of the structured approach is statistical validity — specifically, the ability to generalise findings to a larger population with a known margin of error.

A survey of 1,200 retail investors, carefully sampled, gives you something you can present to a portfolio committee. Six interviews in a coffee shop gives you a vibe. And we already covered what happens when you trade on vibes.

According to Churchill & Iacobucci (2004), in Marketing Research: Methodological Foundations (9th ed., Thomson/South-Western), the validity and reliability of descriptive research instruments are critical to their usefulness — poor survey design introduces systematic bias that invalidates the conclusions. In other words, garbage in, garbage out. Ask a loaded question, get a useless answer. Ask the right question, get the insight that changes your business.

Case Study: Spotify’s Descriptive Audience Research

Before launching its podcast advertising product to brands, Spotify deployed large-scale descriptive research to profile its listener base. Through surveys, listening data analysis, and demographic segmentation studies, Spotify was able to describe, with statistical precision, who was listening to which genre of podcasts, at what time, on which device, and in which income bracket.

This descriptive work gave advertisers the confidence to allocate budget. It wasn’t enough to say “people listen to podcasts.” Spotify could say: “34% of our podcast listeners are between 25–34, have household incomes above £60,000, and listen during their morning commute.” That’s a totally different conversation with a media buyer.

Spotify’s podcast advertising revenue grew significantly following this research-backed positioning, demonstrating that descriptive research is not an academic exercise — it is a commercial weapon.


Part Three: Causal Market Research

What Is Causal Research?

Now we’re getting to the part where things get really interesting. And really expensive. And really easy to get wrong if you don’t know what you’re doing.

Causal research — also known as experimental research — investigates cause-and-effect relationships between variables. It doesn’t just describe what’s happening in a market. It proves why it’s happening and what will happen if you change a specific variable.

The Journal of Marketing Research has described causal research as the gold standard for decision support — because it demonstrates which marketing actions actually produce specific outcomes, rather than merely coinciding with them. This distinction is the difference between correlation and causation, and if you’ve been in finance long enough, you know that confusing these two things can cost you everything.

Let me put it this way: I once watched a trader convince himself that every time he wore his lucky hoodie, the market went up. He backtested it. It looked good. He size up. He wore the hoodie. The market went down 8% in three days. Correlation is not causation, my brother. The hoodie was not the variable.

Causal research is how you stop trusting the hoodie and start trusting the data.

The Mechanics of Causal Research: Experimental Design

The hallmark of causal research is controlled experimental design — specifically, the manipulation of one or more independent variables while holding all others constant, and then measuring the effect on a dependent variable.

The classic format is the A/B test (also called a split test or randomised controlled experiment):

  • You take a population and randomly divide them into two groups.
  • Group A (the control) gets the existing version.
  • Group B (the treatment) gets the new version.
  • You measure outcomes and determine whether the difference is statistically significant.

If Group B outperforms Group A at a 95% or 99% confidence level, you have causal evidence that the manipulation produced the outcome.

This is not soft. This is the scientific method applied to market behaviour. It’s what pharmaceutical companies use to test drugs, what tech companies use to test product features, and what serious traders use to test strategies before allocating real capital.

Why Most People Get Causal Research Wrong

Here’s the thing nobody tells you in the intro textbooks: causal research is hard. It requires careful control of confounding variables — other factors that might independently cause the outcome you’re measuring.

Ellickson, Kar & Reeder (2023), in their paper Estimating Marketing Component Effects: Double Machine Learning from Targeted Digital Promotions, published in Marketing Science (42/4, 704–728), demonstrate sophisticated methods for isolating causal effects in marketing data — precisely because uncontrolled observational data produces unreliable causal inferences. The paper highlights that even with large datasets, you can’t simply “observe” causation. You have to design for it.

In plain terms: just because sales went up after you ran a social media campaign doesn’t mean the campaign caused the sales increase. Maybe there was a holiday. Maybe a competitor went offline. Maybe the economy improved. Causal research controls for all of that. Casual (not causal) analysis does not.

And yes, I did just make a casual vs causal joke in a market research article. You’re welcome.

Tools of Causal Research

  • Randomised Controlled Experiments (RCTs) — The gold standard. Randomly assigned treatment and control groups. Maximum internal validity.
  • A/B and Multivariate Testing — Digital versions of RCTs, widely used in e-commerce, SaaS, and trading platforms.
  • Quasi-Experimental Designs — Used when full randomisation isn’t possible. Includes difference-in-differences, regression discontinuity, and instrumental variables.
  • Field Experiments — Real-world causal tests conducted in natural settings rather than controlled labs.

Eckles & Bakshy (2021), in Bias and High-Dimensional Adjustment in Observational Studies of Peer Effects, published in the Journal of the American Statistical Association (116/534, 507–517), provide rigorous methodological guidance on controlling for bias in observational causal studies — a crucial read for anyone doing causal inference without the luxury of full randomisation. Which, let’s be honest, is most of us in real-world market conditions.

Case Study: Amazon’s Pricing and Causal Experimentation

Amazon runs hundreds of causal experiments simultaneously. This is not an exaggeration. Their entire dynamic pricing engine, recommendation system, and interface design is built on a foundation of continuous A/B and multivariate testing.

In one well-documented instance, Amazon tested whether offering free shipping on orders above a certain threshold (rather than a flat discount) caused higher average order values. The exploratory phase had suggested customers valued shipping offers. The descriptive phase had quantified the average order value and customer sensitivity to shipping costs. The causal phase ran a controlled experiment — some customers saw a shipping threshold offer, others saw a price discount of equivalent monetary value.

The result: the free shipping threshold causally increased average order value by a statistically significant margin. Amazon implemented it globally. The experiment had done what no amount of observation or description could have done alone — it proved the mechanism.

That decision, backed by causal research, contributed to one of the most profitable pricing innovations in e-commerce history. And it started with someone asking, “Wait, but does the free shipping cause bigger baskets, or do bigger baskets just happen to correlate with free shipping?”

Those are very different questions. Causal research is the only method that answers them properly.


The Three Research Types Working Together: A Sequential Framework

Here’s what the textbooks sometimes fail to emphasise clearly enough: these three types of research are not mutually exclusive alternatives. They are sequential stages of a rigorous research process.

The smartest traders and the most successful businesses don’t choose one. They move through all three:

Stage 1 — Exploratory: “I don’t understand why my strategy stopped working six months ago. Let me talk to some other traders, read some papers, and dig into the qualitative side of this.”

Stage 2 — Descriptive: “Now that I have some hypotheses, let me go get quantitative data. What does the distribution of returns look like? How many traders are using this strategy? What’s the average drawdown in trending versus ranging markets?”

Stage 3 — Causal: “I’ve identified a potential relationship between volatility regime and strategy performance. Let me run a controlled backtest with proper out-of-sample validation to determine whether volatility regime causally affects the strategy’s edge — or whether that was a spurious correlation in my original data.”

This is how serious research gets done. And before anyone says “that sounds like a lot of work” — yes. Yes it does. And it sounds a lot less work than rebuilding your account from scratch after trading on instinct for six months.

The Risk of Skipping Steps

Skipping exploratory and jumping straight to descriptive means you’re asking the wrong questions with great precision. Very expensive. Very common.

Skipping straight to causal without a descriptive baseline means you have no idea what “normal” looks like, so you can’t measure change. You’re testing blindly.

And running only exploratory, never advancing to descriptive or causal? That’s the research equivalent of planning a trip and never actually leaving the house. Very thorough itinerary. Zero destinations reached.

Malhotra & Birks (2006), in Marketing Research: An Applied Approach (3rd ed., Pearson), describe this progression explicitly — noting that research design should be iterative and cumulative, with each stage informing and necessitating the next. Research is a process, not an event.


Common Mistakes in Market Research (And What They Cost You)

Since we’re being honest with each other — and since I’ve made basically all of these mistakes personally — let’s go through the most common errors in market research and what they actually cost you in practice.

Mistake 1: Treating Exploratory Findings as Definitive

You ran three focus groups and everyone said they’d pay £50 for your product. You launched at £50. No one bought. Congratulations, you’ve discovered the gap between what people say they’ll do and what they actually do. It’s called the social desirability bias, and it’s the reason we validate with descriptive surveys and causal experiments before betting the farm.

You cannot trust what people say they’ll do. You can only trust what they actually do when conditions are controlled.

Mistake 2: Confusing Correlation with Causation in Descriptive Data

Your descriptive data shows that customers who buy Product A also tend to buy Product B. Excellent. Now you bundle them together. Sales of both drop. Why? Because Product B wasn’t caused by Product A — customers who bought Product A were buying Product B from a competitor at a lower price. The bundling disrupted that behaviour.

Correlation is not causation. It never was. It never will be. Get a tattoo of this if you have to.

Mistake 3: Underpowered Causal Experiments

You ran an A/B test with 200 participants for three days and declared the result significant. Then you rolled it out globally. Then global performance looked nothing like your test. Why? Your test was underpowered — the sample was too small and the duration too short to produce a reliable estimate of the true effect. Statistical noise looked like signal.

Feder et al. (2022), in Causal Inference in Natural Language Processing, published in Transactions of the Association for Computational Linguistics (10, 1138–1158), extensively discuss the problem of spurious causal findings arising from inadequate experimental design — a problem that plagues not just NLP research but any field that rushes to causal conclusions without adequate statistical power. The traders and analysts who understand statistical power have a permanent edge over those who don’t.

Mistake 4: Ignoring External Validity

Your causal experiment worked perfectly — in your controlled sample, in a specific month, in one geographic market. You generalise globally. It fails everywhere else because the conditions of your test were not representative of the broader population.

Internal validity (did the experiment work?) and external validity (do the results generalise?) are both necessary. Many researchers nail the first and forget the second entirely.


How to Choose the Right Research Type

Here’s a simple framework for choosing:

Use exploratory research when:

  • You’re entering a new market with limited prior knowledge
  • A problem exists but is poorly defined
  • You need to generate hypotheses before testing them
  • Budget and time are limited and you need directional guidance
  • The market is fast-moving and you need qualitative speed over quantitative precision

Use descriptive research when:

  • You need to quantify and profile a market or customer segment
  • You’re presenting findings to stakeholders who require statistical evidence
  • You need to establish a baseline before running experiments
  • You’re tracking changes in market conditions over time
  • You need to understand the what before explaining the why

Use causal research when:

  • You need to prove that a specific action produces a specific outcome
  • You’re making a large-scale resource allocation decision that requires evidence beyond correlation
  • You need to evaluate the effectiveness of a marketing campaign, pricing change, or product feature
  • Your exploratory and descriptive research has produced a clear, testable hypothesis
  • The cost of being wrong is high enough to justify the investment in rigorous experimental design

And honestly? Most serious decisions benefit from all three. Use them sequentially. Don’t skip steps. And don’t let anyone convince you that their gut feeling is a substitute for methodology.


Applications in Trading and Financial Markets

Let’s bring this all the way home to where we live: financial markets.

Traders and investment analysts use all three types of research, though they don’t always use these labels:

Exploratory in trading: Qualitative fundamental analysis — reading earnings call transcripts, conducting management interviews, studying sector dynamics, reviewing analyst commentary. You’re exploring what’s happening before you build a thesis.

Descriptive in trading: Quantitative market profiling — backtesting statistics, market microstructure analysis, sector rotation data, order flow analysis, macro indicator tracking. You’re describing the state of the market with precision.

Causal in trading: Strategy validation through rigorous backtesting, walk-forward analysis, and paper trading — testing whether a specific signal causes a return, or whether the apparent relationship is a product of data mining and survivorship bias.

Ghose, Lee, Nam & Oh (2024), in The Effects of Pressure (cited in American Marketing Association, Causal Inference with Quasi-Experimental Data, 2024), demonstrate how quasi-experimental causal designs are being applied to real consumer and financial behaviour datasets — with implications that extend directly into how traders and analysts can validate behavioural theories about market participants.

The best traders I’ve ever met are not the ones with the best chart patterns. They’re the ones with the most rigorous process. They explore. They describe. They test causally. And then — only then — they size up.


The Cost of Getting It Wrong: Real-World Consequences

Let me get serious for a moment — well, as serious as someone who once described a candlestick chart as “personally attacking me” can get.

The consequences of choosing the wrong research type, or skipping research altogether, are not hypothetical. They are documented. They are expensive. And they are entirely avoidable.

New Coke (1985) is the most cited market research cautionary tale in business school history, and for good reason. Coca-Cola conducted extensive descriptive research — blind taste tests across 200,000 participants — that showed consumers preferred the sweeter New Coke formula over both Original Coke and Pepsi. Numbers were solid. Sample size was robust. Descriptive research said go.

What Coca-Cola failed to do was the exploratory work that would have uncovered a critical qualitative truth: consumers’ relationship with Coca-Cola was not just about taste. It was emotional, cultural, and nostalgic. The exploratory research would have revealed that you can’t measure brand loyalty in a blind taste test, because in a blind test, people aren’t choosing a brand — they’re just choosing sugar levels.

The result? One of the most catastrophic product launches in consumer goods history, reversed within 79 days. The lesson? Descriptive research gives you data. Exploratory research gives you context. Without both, the data misleads you — confidently, expensively, and very publicly.

On the trading side, the 2008 financial crisis is the ultimate example of causal research failure at institutional scale. Risk models at major financial institutions described mortgage-backed security correlations under normal conditions with great statistical precision. But the causal question — what happens to these correlations under simultaneous systemic stress? — was never properly tested with scenarios representative of genuine tail risk.

The descriptive models said: risk is low. The exploratory qualitative signals — rising delinquency rates, loosening credit standards, housing price deceleration — were available and were largely ignored or underweighted. No rigorous causal testing was performed to validate whether the risk models held under unprecedented conditions.

The global economy found out the answer to the causal question in real time. That’s an expensive way to run an experiment.

These are not cautionary tales about research being insufficient. They are cautionary tales about research being incomplete. New Coke skipped exploratory depth. The 2008 models skipped causal stress testing. In both cases, the missing research layer was the one that mattered most.

The takeaway is blunt: every research type exists for a reason. Respect the sequence. Don’t let budget constraints or deadline pressure compress your methodology to the point where you’re building decisions on a foundation that cannot support them.

The market will always find the weakness in your foundation. It’s literally the market’s full-time job.


A Note on Sample Size, Bias, and the Ethics of Market Research

No discussion of market research is complete without acknowledging its vulnerabilities.

Sample bias is the silent killer of good research. If your sample is not representative of your target population — if it over-represents a particular demographic, geography, or opinion — your findings are systematically wrong. And systematically wrong findings, acted upon at scale, produce systematically bad decisions.

Confirmation bias is the researcher’s version of wearing the lucky hoodie. We tend to find evidence for what we already believe. Good research design — particularly in the causal phase — is explicitly constructed to overcome this. Double-blind experiments, pre-registered hypotheses, and out-of-sample testing are all tools designed to protect your research from your own wishful thinking.

Researcher effect (also called the observer effect) in qualitative exploratory research can cause participants to modify their behaviour when they know they’re being studied. This is why the best exploratory research builds rapport before asking the hard questions.

These are not abstract academic concerns. They are the operational backbone of your entire research process, and they are the reason your research either tells you the truth or tells you a flattering lie. And in markets — as in life — flattering lies delivered with statistical confidence are significantly more dangerous than uncomfortable truths delivered plainly.


Conclusion: Research Is Your Edge

We covered a lot of ground today. Let me bring it home clean.

Exploratory market research is your discovery tool. Qualitative, flexible, hypothesis-generating. Use it when you don’t yet know what questions to ask. It opens the right doors and closes the wrong ones.

Descriptive market research is your profiling tool. Quantitative, structured, and statistically generalisable. Use it to describe markets, customers, and conditions with precision. It draws maps.

Causal market research is your ultimate proof tool. Experimental, rigorous, cause-and-effect. Use it to prove that specific actions produce specific outcomes. It gives you the conviction to act at scale.

Used sequentially, these three approaches form a complete research ecosystem — one that the world’s most successful companies and most disciplined traders use every single day.

I started this article telling you that entering a trade without research is the most expensive lesson of your life. I want to end it by telling you the opposite: entering a trade with rigorous, sequential, methodologically sound research is the most underrated competitive advantage available to any market participant.

Your competitors are out there trusting their gut. Trust your process.

The market has no loyalty, no memory, and no mercy. But it absolutely, unfailingly rewards preparation and punishes complacency.

Now go do your research. Read everything. Question your assumptions. Run your tests properly. And maybe — just maybe — leave the lucky hoodie at home.


References

  1. Sreejesh, S., Mohapatra, S., & Anusree, M. R. (2014). Business Research Design: Exploratory, Descriptive and Causal Designs. ResearchGate / Springer.
  2. Malhotra, N. K. (2019). Marketing Research: An Applied Orientation (7th ed.). Pearson Education.
  3. Malhotra, N. K., & Birks, D. F. (2006). Marketing Research: An Applied Approach (3rd ed.). Pearson Education.
  4. Churchill, G. A., & Iacobucci, D. (2004). Marketing Research: Methodological Foundations (9th ed.). Thomson/South-Western.
  5. Ellickson, P. B., Kar, W., & Reeder, J. C. (2023). Estimating Marketing Component Effects: Double Machine Learning from Targeted Digital Promotions. Marketing Science, 42(4), 704–728.
  6. Eckles, D., & Bakshy, E. (2021). Bias and High-Dimensional Adjustment in Observational Studies of Peer Effects. Journal of the American Statistical Association, 116(534), 507–517.
  7. Feder, A., Keith, K. A., Manzoor, E., Pryzant, R., Sridhar, D., & Wood-Doughty, Z., et al. (2022). Causal Inference in Natural Language Processing: Estimation, Prediction, Interpretation and Beyond. Transactions of the Association for Computational Linguistics, 10, 1138–1158.
  8. Ghose, A., Lee, H. A., Nam, K., & Oh, W. (2024). Causal Inference with Quasi-Experimental Data. American Marketing Association.
  9. Creswell, J. W. (2005). Educational Research: Planning, Conducting, and Evaluating Quantitative and Qualitative Research (2nd ed.). Pearson Education.
  10. Collins, K. M. T., Onwuegbuzie, A. J., & Sutton, I. L. (2006). A model incorporating the rationale and purpose for conducting mixed methods research in special education and beyond. Learning Disabilities: A Contemporary Journal, 4, 67–100.

Disclaimer:  This article is for educational and informational purposes only and does not constitute financial or investment advice. Always conduct your own due diligence before making trading or business decisions.