He is well known in the Econometrics field specially for the "Heteroskedasticity-Robust Standard errors" (though the first paper to deal with this problem goes back to Eicker (1967) ) and the tests to detect Heteroskedasticity (see White (1980) ).
It is really worth to take a look at his work.
In 2010, White published a paper on duration analysis, an area that I have a particular interest.
Without any doubt, the world lost a great econometrician. Rest in Peace.