In a 2-country and 3-period OLG model with education, we study the impact on international migration of the two sided characteristics of borders. Individuals must first "leave" their home country before "entering" the destination country. Indeed, each social planner chooses the static welfare...

A new theorem is proposed for allocating the value of an open-loop optimal control problem over the planning period between its various state variables. Potential applications in economics and management are suggested