When in a group you really become frustrated leave that group and stay alone, it's better than to make your mind mad early in the morning.

Long way to go in life , hurdles come and go , but we have to become dynamic and change our strategy.

Planned to read in July.... since few months I was not able to concentrate...Hope I will be able to finish atleast majority in the month of July

Can some one say whether IV-GMM can be applied when t>n( time period is greater than panel of countries).