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Viewpoint: Estimating the causal effects of policies and programs
Author(s) -
Smith Jeffrey,
Sweetman Arthur
Publication year - 2016
Publication title -
canadian journal of economics/revue canadienne d'économique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.773
H-Index - 69
eISSN - 1540-5982
pISSN - 0008-4085
DOI - 10.1111/caje.12217
Subject(s) - credibility , interpretation (philosophy) , causal inference , identification (biology) , context (archaeology) , internal validity , positive economics , inference , estimation , economics , epistemology , econometrics , computer science , medicine , paleontology , philosophy , botany , management , pathology , biology , programming language
Estimation, inference and interpretation of the causal effects of programs and policies have all advanced dramatically over the past 25 years. We highlight three particularly important intellectual trends: an improved appreciation of the substantive importance of heterogeneous responses and of their methodological implications, a stronger focus on internal validity brought about by the “credibility revolution,” and the scientific value that follows from grounding estimation and interpretation in economic theory. We discuss a menu of commonly employed partial equilibrium approaches to the identification of causal effects, emphasizing that the researcher's central intellectual contribution always consists of making an explicit case for a specific causal interpretation given the relevant economic theory, the data, the institutional context and the economic question of interest. We also touch on the importance of general equilibrium effects and full cost–benefit analyses.