We show an introduction to the econometric research that uses panel-data. In the first part, we describe the development of panel-data models from the nineteenth century to the beginning of the twenty-first one. In the second part, we describe the models with fixed, random and dynamic effects. In the subsequent parts we describe some trends in the econometric research referred to Mexico. Specifically, we show the trends that characterize published studies; and some trends in the use of the models in certain areas of knowledge (social sciences, economics, international economics, finance, public finance). We assess the trends with the articles in the REDALYC database referred to the period 2000-2011.