Many interesting dynamic load balancing schemes have been proposed for efficient use of the available frequency spectrum, and, in particular, to increase the capacity of congested or hot cells in a cellular network. We provide a simple theoretical framework which leads to closed-form expressions for evaluating the performance of some of the most important dynamic load balancing strategies proposed in the literature. To the best of our knowledge, this is the first generalized theoretical framework that can be used to evaluate the performance of many different dynamic load balancing schemes with simple closed-form results. The accuracy of the developed expressions is checked and verified by comparing their results with simulation results provided in the literature. There is an excellent match between the predictions of our theoretical framework and the simulation results.