Modelling is one of the key methods of scientific cognition in economics. It is a simplification of the existing reality with a view to its further study. The modeling method is so established in eco- nomic science that modern economic theory is completely defined by models as some formal...

It is no secret that one of the key sources of economic growth is the entrepreneurial activity. But this type of activity is fraught with great risk, which is largely exacerbated by liquidity constraints. This situation is especially relevant for countries with a high level of income inequality,...