Joao M. C. Santos Silva, "A Score Test for Non-Nested Hypotheses 
with Applications to Discrete Data Models", Journal of Applied 
Econometrics, Vol. 16, No. 5, 2001, pp. 577-597.

The data used in this paper were previously studied by Gurmu, S. and
Trivedi, P. K. (1996). "Excess Zeros in Count Models for Recreational
Trips," Journal of Business & Economics Statistics, 14, 469-477, and were
obtained from the JBES ftp site:

  ftp://www.amstat.org/JBES_View/96-4-OCT/gurmu_trivedi/

The data, which are in the ASCII file recreat.dat in DOS format, are zipped
in the file ss-data.zip.

The following is a copy of the data description provided by Gurmu
and Trivedi at the ftp address above.


     This subdirectory contains the dataset for the article 
"Excess Zeros in Count Models for Recreational Trips".

recreat.dat;  659 rows by 8 columns.

column 1:  Number of boating trips to Lake Somerville, East Texas,  
           in 1980  (V3)
column 2:  Facility's subjective quality ranking  (SO)
column 3:  Respondent's taste for water-skiing  (SKI)
column 4:  Income - categorical variable  (I)
column 5:  Cost dummy variable; 1 if an annual user fee is 
           paid at Lake somerville  (FC3) 
column 6:  Travel cost to Lake Conroe  (C1)
column 7:  Travel cost to Lake Somerville  (C3)
column 8:  Travel cost to Lake Houston  (C4)

     A detailed discussion of the variables can be found in Sellar, C.,
Stoll, J.R., and Chavas, J.P (1985), "Validation of Empirical Measures of
Welfare Change: A Comparison of nonmarket Techniques," Land Economics, 61,
156-175.  Data used with permission of Sellar et al. (1985), and Ozuna,T.
and Gomaz, I. "Specification and Testing of Count Data Recreation Demand
Functions," Empirical Economics, forthcoming.