A comprehensive analysis of nearly 300,000 asylum decisions by 208 immigration judges over the last five years shows wide disparities in granting asylum, from a low of 3 percent by Miami judge Mahlon F. Hanson to a high of 89 percent by New York’s Terry A. Bain.

The findings, released last week, coincided with orders from Attorney General Alberto R. Gonzales that the Executive Office of Immigration Review overhaul its lax discipline system, institute annual quality reviews and require competency tests for the nation’s immigration judge corps beginning next year.