, covering the period 1978 to 2001. In the framework of the markup estimation method suggested by Roeger (1995), we test for both …

" of the synthetic control method. Sweden switched from left-hand to right-hand traffcin 1967. Before 1967, however, almost … in the period after 1967, when both Sweden and other European countries drove on the right and used LHD vehicles. Results … show that right-hand traffic decreased road fatality, injury and accident risk in Sweden by a proximately 30 percent. An …