Gad Allon, Michael Beenstock, Steven Hackman, Ury Passy, and Alexander
Shapiro, "Nonparametric Estimation of Concave Production Technologies by
Entropic Methods", Journal of Applied Econometrics, Vol. 22, No. 4,
2007, pp. 795-816.

The source of the data is:

A. Zellner and N. Revankar (1969), "Generalized Production Functions," The
Review of Economic Studies, Vol. 36, pp. 241-250

and

Arnold Zellner and Hang Ryu, "Alternative Functional Forms for Production,
Cost, and Returns to Scale Functions", Journal of Applied Econometrics, Vol.
13, No. 2, 1998, pp. 101-127.

Data description : 1957 U.S. Annual Survey of Manufactures Data for the
Transportation Equipment Industry. 

The data are ordered variable by variable in the same sequence as listed
below.

variable

1. State
2. Aggregate value added  (unit : millions of dollars)
3. Aggregate capital service flow (unit : millions of dollars)
4. Aggregate man-hours worked (unit : millions of man-hours)
5. No. of establishments

Alabama   California  Connecticut  Florida       Georgia
Illinois  Indiana     Iowa         Kansas        Kentucky
Louisiana Maine       Maryland     Massachusetts Michigan
Missouri  New Jersey  New York     Ohio          Pennsylvania
Texas     Virginia    Washington   West Virginia Wisconsin

126.148 3201.486  690.670   56.296  304.531 
723.028  992.169   35.796  494.515  124.948 
 73.328   29.467  415.262  241.530 4079.554 
652.085  667.113  940.430 1611.899  617.579 
527.413  174.390  636.948   22.700  349.711

 3.804  185.446   39.712   6.547  11.530 
58.987  112.884    2.698  10.360   5.213  
 3.763    1.967   17.546  15.347 435.105 
32.840   33.292   72.974 157.978  34.324 
22.736    7.173   30.807   1.543  22.001

 31.551 452.844  124.074  19.181  45.534 
 88.391 148.530    8.017  86.189  12.000 
 15.900   6.470   69.342  39.416 490.384 
 84.831  83.033  190.094 259.916  98.152 
109.728  31.301   87.963   4.063  52.818

 68  1372  154  292   71 
275   260   75   76   31
115    81  129  172  568
125   247  461  363  233
308    85  179   15  142