This research explores how the environmental dynamism affects the relationship between familiness and a family firm¿s performance in an emerging economy. To achieve this goal, we used an instrument to measure three familiness theoretical dimensions (process, human, and organizational resources). To collect data, we interviewed owners of family firms characterized as SMEs in México. Contrary to what is expected, our findings suggest that familiness, as a source of competitive advantage for family firms, may be more suitable in stable environments characterized by certainty of conditions. In other words, the effect of familiness on a family firm¿s performance diminishes in highly dynamic environments.
