In the area of applied mathematics known as the theory of economic games there is a great deal of focus on optimal or even feasible strategies for countries involved in international relationships. Often, what is desired is to determine a scenario where all the participating countries benefit. This is formally known as a Nash equilibrium after the late John F. Nash Jr. who shared a Nobel Prize in 1994.
Originally, we analyzed strategies for the Socialist Republic of Vietnam. Included were (1) the usefulness of continued investment in nuclear power (2) the transition from a centrally planned economy dominated by agriculture to an industrial, market-based economy (3) international cooperation in response to geological disasters and epidemiological challenges (4) the construction of a high-speed rail network.