rice.def

	Firm  Year  PROD  AREA  LABOR  FERT
  
  Obs:   a panel with 44 firms over 8 years (1990-1997)
	total observations = 352

  	Firm	Firm number  ( 1 to 44)
	Year	Year = 1990 to 1997
	PROD	Rice production (tonnes)
	AREA	Area planted to rice (hectares)
	LABOR	Hired + family labor (person days)
	FERT	Fertilizer applied (kilograms)

           
Data source: These data were used by O’Donnell, C.J. and W.E. Griffiths (2006), 
	“Estimating State-Contingent Production Frontiers”, American Journal of 
	Agricultural Economics, 88(1), 249-266.             



    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
        Firm |       352        22.5     12.7165          1         44
        Year |       352      1993.5    2.294549       1990       1997
        PROD |       352    6.466392    5.076672        .09       31.1
        AREA |       352    2.117528    1.451403         .2          7
       LABOR |       352    107.2003     76.6456          8        436
-------------+--------------------------------------------------------
        FERT |       352    187.0545    168.5852        3.4     1030.9