What are the advantages and disadvantages in economy of parliamentary government?
To be honest, it’s not the form of government that matters as much to an economy as the powers invested in that government. If an independent Central Bank controls money supply and sets its policy without regard to Parliamentary advice or direction, then parliament is limited to controlling tax policy (which impacts discretionary spending, as well as businesses development) and trade policy. Institutionally speaking, there is no general way to differentiate a parliamentary government from a bicameral legislature in a constitutional republic from a monarchy.