'Essays in Economic Theory' combines two essays on game theory and its applications in economics. The first, 'Learning Behavior and the Noncooperative Equilibrium', considers whether an adaptive justification, like those commonly available for the optimization models frequently employed elsewhere in economics, can be found for the Nash noncooperative equilibrium. The second essay, 'A Game of Fair Division', was motivated by the desire to find attractive methods for solving allocation problems and bargaining disputes that are simple enough to provide useful alternatives to existing methods.