yearly observations of 50 states from 1977 to 1990
number of observations : 700
country : United States
economic topic : public economics
econometrics topic : variable coefficients
A dataframe containing :
the state id
the year of observation
the number of equipment divided by the number of the equipment in the given state for the most recent period
a linear trend
a dummy variable for the presence of a certificate of need regulation for the given state and the given period
Journal of Applied Econometrics data archive : http://jae.wiley.com/jae/.
Steven B. Caudill, Jon M. Ford and David L. Kaserman (1995) “Certificate of need regulation and the diffusion of innovations : a random coefficient model”, Journal of Applied Econometrics, 10, 73–78..