He also served as a visiting professor at several universities in the United States, Canada, Europe and Japan.

Diskin's research focuses on comparative politics, democracy, game theory, electoral systems and voting behavior.

During the 2000s he published (often in conjunction with Moshe Koppel) two solutions to John Nash’s bargaining problem, a solution of the Voting Power measurement, a proof of the association between ‘strategic non-voting’ and ‘decisiveness’ of electoral competitions in the United States and Britain in the twentieth century, a proof of homogeneity in Swiss referendums, and a new measure of electoral malapportionment, volatility and disproportionality.

In the 1980s and the early 1990s, he chaired the Cadets’ Committee of the Israeli Ministry of Foreign Affairs.

Diskin has published two satirical works (On the Sinking Ship and The Lagado Travel).