Different constraints are decisive for different situations, but the most fundamental constraint is limited time.

I am saying that the economic approach provides a valuable unified framework for understanding all human behaviour

Still, intuitive assumptions about behavior is only the starting point of systematic analysis, for alone they do not yield many interesting implications.

The most fundamental constraint is limited time

Even a wizard would have a great deal of difficulty repealing the economic law that higher minimum wages reduce employment. Since politicians are not wizards, they should not try.

Why in almost all societies have married women specialized in bearing and rearing children and in certain agricultural activities, whereas married men have done most of the fighting and market work?

A stronger yuan could lead to greater Chinese asset accumulation in the U.S. and elsewhere.