White's heteroskedasticity test
[f,f_pvalue,nvar2,r2]=white0(r,np)
r = results tlist from a first stage estimation
np = 'noprint' if the user does not want to print the results
f = value of the Xiª hetero F test
f_pvalue = its p-value
nvar2 = # of exogenous variables of the White second stage regression
r2 = Rª of the auxilliary regression
load(GROCERDIR+'data/bdhenderic.dat'); bounds('1964q3','1989q2'); rols=ols('delts(lm1-lp)','delts(lp)','delts(lagts(1,lm1-lp-ly))','rnet', 'lagts(1,lm1-lp-ly)', 'const'); [f,f_pvalue,nvar2,r2]=white0(rols) // Useful mainly for programming purpose (since white does much more).