While many heterodox economic scholars hope for a paradigmatic change in economics due to the great financial crisis, this paper emphasizes that path-dependent elements and institutional factors within the economic community constitute a substantial barrier for paradigmatic change. Focusing on the citation behavior of economists in heterodox journals in general and in Post-Keynesian journals in particular, we discuss some structural reasons for the marginalization of heterodox economic thought in connection with the positive feedback mechanisms provided by the institutional framework of the economic discipline.