Но все же, отсутствие четкой систем

Но все же, отсутствие четкой системы институтов породили так называемый «серый рынок».

Results (English) 1:

But still, the lack of a clear system of institutions have given rise to the so-called "grey market".

Results (English) 2:

Still, the lack of a clear system of institutions gave rise to the so-called "gray market".

Results (English) 3:

But still, the lack of a clear system institutions have created the so-called "gray market".