The study doesn’t include large employers, such as fast-food chains, that have locations both inside and outside Seattle. But the researchers say they did account for big employers in a separate survey of more than 500 Seattle businesses. The results showed employers with multiple locations were more likely to cut jobs as a result of the wage increase than those with just one location.
“It’s fair to say that it is a blind spot in our data, but it’s not a blind spot in our survey,” said Jacob Vigdor, a University of Washington public policy professor who worked on the study. “Our best guess as to what we’re missing is we’re missing effects that are even more negative than what we reported.”
The Seattle Minimum Wage Study survey is a dead-end, it's completely qualitative which is why multi-site businesses were excluded from this study.
The authors argue that excluding almost 40 percent of state employment from the analysis will likely have no effect on their findings. They cite results from a survey of 500 business owners before and after the minimum wage went into effect in Seattle. According to the survey, before the increase, multi-site employers were more likely than single-site employers to report that they intended to reduce employment in the wake of the Seattle ordinance and, after the increase, multi-site employers were more likely to report a reduction in employees. These qualitative reports of employer intentions before the increase and the retrospective, qualitative assessments of employer actions one year after the increase, however, are not a substitute for hard data on what these businesses actually did after the ordinance went into effect. And—what is at least as important—these qualitative reports on Seattle businesses tell us nothing about about the employment changes in the rest of Washington, the comparison group for this study’s estimates of the effects of the minimum wage.
---- http://m.startribune.com/seattle-study-shows-low-wage-jobs-d...
The study doesn’t include large employers, such as fast-food chains, that have locations both inside and outside Seattle. But the researchers say they did account for big employers in a separate survey of more than 500 Seattle businesses. The results showed employers with multiple locations were more likely to cut jobs as a result of the wage increase than those with just one location.
“It’s fair to say that it is a blind spot in our data, but it’s not a blind spot in our survey,” said Jacob Vigdor, a University of Washington public policy professor who worked on the study. “Our best guess as to what we’re missing is we’re missing effects that are even more negative than what we reported.”