What did Weber mean by an ‘ideal type’? Does the use of a Weberian typology help or hinder in the study of diasporas?

ST U D Y I N G D I A S P O R A S

What did Weber mean by an ‘ideal type’? Does the use of a Weberian
typology help or hinder in the study of diasporas?
Why do some observers see diasporas in a negative light? Do you agree
with their views?
How successful are diasporas as agents of development compared with
development aid and states in poor countries?