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What are the respective roles of theory, qualitative research and statistical analysis in establishing causality?. Simon Burgess Research Methods Conference, November 2007. Big words. Causality Theory Qualitative research
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What are the respective roles of theory, qualitative research and statistical analysis in establishing causality? Simon Burgess Research Methods Conference, November 2007
Big words • Causality • Theory • Qualitative research • Participant observation, semi-structured interviews, ethnography, textual analysis, … • Statistical analysis • Econometrics, biometrics, multi-level modelling, … www.bris.ac.uk/Depts/CMPO
Two main points • Counterfactuals • Central issue in causality • Constructing counterfactuals • Heterogeneity • Ex ante and ex post • Outcomes and motivations • Capturing and understanding motivations • Individual motivation and outcomes www.bris.ac.uk/Depts/CMPO
Counterfactuals • Central issue in causality • Constructing counterfactuals • Statistical methods … • Qualitative research … • Heterogeneity • Range of effects; causality is in expectation • Large sample sizes important • Ex ante and ex post • Theory is crucial in being able to construct counterfactuals ex ante. www.bris.ac.uk/Depts/CMPO
Outcomes and Motivations • Capturing and understanding motivations • Understanding motivations behind actions • Individual motivation and outcomes • Examples: • Training and employment • Inflation and monetary policy • Individuals in systems: • Individual motivations can lead to very different market outcomes. www.bris.ac.uk/Depts/CMPO
Conclusions • Theory, qualitative research and statistical analysis: • All have a role. • If could only fund one – statistical analysis. • Trust the answers more if qualitative research backs it up. • A theoretical framework is necessary to discuss causality ex ante. www.bris.ac.uk/Depts/CMPO