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Lecture_15__Prof._Arkonac's_Slides_(Ch_10_Panel_Data)

Lecture_15__Prof._Arkonac's_Slides_(Ch_10_Panel_Data) -...

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Panel Data I & II (Fall 2010) Lecture 15 Prof: Seyhan Erden Arkonac, PhD 1

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2 Regression with Panel Data A panel dataset contains observations on multiple entities (individuals), where each entity is observed at two or more points in time. Hypothetical examples : Data on 420 California school districts in 1999 and again in 2000, for 840 observations total. Data on 50 U.S. states, each state is observed in 3 years, for a total of 150 observations. Data on 1000 individuals, in four different months, for 4000 observations total.
3 Notation for panel data A double subscript distinguishes entities (states) and time periods (years) i = entity (state), n = number of entities, so i = 1,…, n t = time period (year), T = number of time periods so t =1,…, T Data: Suppose we have 1 regressor. The data are: ( X it , Y it ), i = 1,…, n , t = 1,…, T

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