Jämför metoder

	Tidsvarierande parameter System GMM	Dynamisk paneldatamodell
Ämnesområde	Ekonometri	Ekonometri
Familj	Regression model	Regression model
Ursprungsår	1998 (System GMM); TVP extensions in applied literature thereafter	1988–1991
Upphovsperson	Blundell & Bond (System GMM base); Cooley & Prescott (TVP framework)	Arellano & Bond (1991); Holtz-Eakin, Newey & Rosen (1988)
Typ	Dynamic panel estimator with time-varying coefficients	Dynamic regression / GMM estimation
Ursprungskälla	Blundell, R., & Bond, S. (1998). Initial conditions and moment restrictions in dynamic panel data models. Journal of Econometrics, 87(1), 115–143.	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.
Alias	TVP System GMM, time-varying System GMM, TVP-SGMM, dynamic panel TVP estimator	dynamic panel model, panel data model with lagged dependent variable, DPD model, Arellano-Bond model
Närliggande	6	5
Sammanfattning	Time-Varying Parameter System GMM extends the Blundell-Bond System Generalized Method of Moments estimator to allow regression coefficients to change over time. By combining the instrument-based correction for dynamic endogeneity with a time-varying coefficient structure, the method captures both the persistence of the lagged dependent variable and structural shifts in the effect of regressors across periods.	The dynamic panel data model extends standard panel regression by including a lagged value of the outcome variable as a regressor, capturing persistence and adjustment dynamics. Because the lagged dependent variable is correlated with the unit-specific fixed effect, ordinary OLS or within estimators are biased; GMM-based methods using internal instruments are the standard remedy.