1200 Mhz Anthalon

sem model: y = X*b + u
           u = p*W*u + e

time for 2,000 draws
time in seconds                matlab      c-mex
49 obs sem model              57.7130     3.0840
49 obs sem probit model       59.8460     3.3950
49 obs sem tobit model        58.4740     3.3650
3,107 obs sem model         1140.4700   582.6180
3,107 obs sem probit model  1162.4610   610.2680
3,107 obs sem tobit model   1141.2810   614.7740
