Zoltan L. Hajnal, Vladimir Kogan, and G. Agustin Markarian have written this article for AJPS. Here is the abstract:
We examine how the timing of local elections affects the success of minority candidates, who remain woefully underrepresented in public office. We build on research showing that concurrent elections narrow racial gaps in voter turnout and leverage changes in the timing of local elections in California. Our analysis shows that filling local offices in November of even years increases minority officeholding, at least for some groups. The results demonstrate how, when, and for whom election timing matters. Latinos gain most, potentially at the expense of White and, to a lesser degree, Black representation. An investigation of potential mechanisms suggests that these effects depend on group population size and the magnitude of the turnout changes. An increase in the number of co-ethnic candidates running also appears to contribute to the representational benefits of on-cycle elections. Finally, the effects are most pronounced during presidential elections, when turnout improvements are largest.