The effect of Smog-Ozone warnings and a vanpool program on traffic volume in york county of south carolina

Ground-level ozone is a critical criteria pollutant that is significantly generated by transportation patterns. We study the effect of smog–ozone warnings, triggered by the Environmental Protection Agency, on traffic volume in York County, South Carolina during the period 2006–10. In addition, the subperiods 2006–07 and 2008–10, where the ozone smog-alert thresholds 0.080 parts per million (ppm) and 0.075 ppm, respectively, are examined. The approach followed in this paper is a differences-in-differences (DID) regression. Additionally, a regression discontinuity design in the DID framework is applied. We find a negative and significant decrease in weekday peak-hour traffic volume in the treatment group during 2008–10

Whose Liberation? Confronting the Problem of the French Empire, 1944–47

Book synopsis: France's liberation was expected to trigger a decisive break both with the Vichy régime and with the pre-war Third Republic. What happened was an untidy patchwork of unplanned continuities and false starts. This volume analyses the complex process of regime change, economic renewal, social transformation, and adjustment to a fast-evolving world