Welfare in ethnically divided societies depends on privately owned res
ources as well as on a public good, namely cooperation between the var
ious ethnic groups. Economic reforms designed to improve efficiency in
the allocation of privately owned resources may! have an ambiguous im
pact on welfare if they have a negative impact on inter-ethnic coopera
tion and political stability. This may provide an additional explanati
on of why reforms have failed in a number of countries of sub-Sahara A
frica.