পদ্ধতির তুলনা করুন

	প্যানেল ডেটা ইন্সট্রুমেন্টাল ভ্যারিয়েবলস (প্যানেল IV / 2SLS)	কারণগত অনুমানের জন্য ইনস্ট্রুমেন্টাল ভ্যারিয়েবলস (IV) পদ্ধতি
ক্ষেত্র	কার্যকারণ অনুমান	স্বাস্থ্য অর্থনীতি
পরিবার	Regression model	Process / pipeline
উদ্ভবের বছর	1978-1991	1990s (modern applications)
প্রবর্তক	Hausman (1978); Anderson & Hsiao (1982); Arellano & Bond (1991)	Angrist & Pischke (applied econometrics); rooted in econometric theory
ধরন	Causal inference / panel regression	Method
মৌলিক উৎস	Arellano, M., & Bond, S. (1991). Some tests of specification for panel data: Monte Carlo evidence and an application to employment equations. Review of Economic Studies, 58(2), 277-297.	Angrist, J. D., & Pischke, J. S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton: Princeton University Press.
অপর নাম	Panel IV, Panel 2SLS, Within-IV, Fixed-Effects IV	IV, two-stage least squares, TSLS, causal estimation
সম্পর্কিত	4	3
সারসংক্ষেপ	Panel data instrumental variables combines the bias-correcting power of instrumental variables (IV) with the within-unit variation exploited by panel data methods. It addresses endogeneity — omitted variables, reverse causation, or measurement error — in longitudinal settings where observations are repeated across units and time. Seminal contributions come from Hausman (1978) on specification testing and Arellano and Bond (1991) on GMM-based panel IV.	Instrumental variables (IV) is an econometric method to estimate causal effects when treatment or exposure is not randomly assigned and confounding is severe or unmeasured. IV relies on a third variable (instrument) that influences treatment but does not directly affect the outcome, allowing researchers to isolate the causal effect from the noise of confounding. Developed extensively in econometrics (Angrist & Pischke, 1990s–2000s), IV methods are increasingly used in health economics and health services research to leverage natural experiments and policy changes.