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function ldens = lpdfbeta(x,a,b);
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% log BETA PDF
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ldens = gammaln(a+b) - gammaln(a) - gammaln(b) + (a-1)*log(x) + (b-1)*log(1-x);
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% 10/11/03 MJ adapted from a GAUSS version by F. Schorfheide, translated
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% to Matlab by R. Wouters.
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% use Matlab gammaln instead of lngam |