下面那一堆Inf是怎么回事啊?用别人的数据也是这样,愁死了,求高手解答~~
DISTANCES SUMMARY
year = 1
firm crs te rel to tech in yr vrs
no. ************************ te
t-1 t t+1
1 0.000 1.000 0.000 1.000
2 0.000 1.000 0.000 1.000
3 0.000 1.000 0.000 1.000
4 0.000 1.000 0.000 1.000
mean 0.000 1.000 0.000 1.000
[Note that t-1 in year 1 and t+1 in the final year are not defined]
MALMQUIST INDEX SUMMARY
MALMQUIST INDEX SUMMARY OF ANNUAL MEANS
year effch techch pech sech tfpch
mean Inf Inf Inf Inf Inf
MALMQUIST INDEX SUMMARY OF FIRM MEANS
firm effch techch pech sech tfpch
1Inf Inf Inf Inf Inf
2Inf Inf Inf Inf Inf
3Inf Inf Inf Inf Inf
4Inf Inf Inf Inf Inf
mean ****************************************
[Note that all Malmquist index averages are geometric means]