Editor’s Note: IPP Research Director Peter Fisher authored a guest opinion for The Gazette in Cedar Rapids (published February 4) about minimum-wage research on which Fisher and University of Iowa Economics Professor John Solow collaborated for the Johnson County minimum wage task force. In the same issue, The Gazette included a staff editorial, “Local wage hike achieved its goals.” The Fisher guest opinion ran beside another guest opinion by a spokesman for the low-wage industry backed Employment Policies Institute, an incessant critic of minimum-wage laws. Below is a response from Fisher and Solow to that criticism.
Michael Saltsman’s guest opinion in the February 4 Gazette says we got it “all wrong” in our report on the effects of the minimum wage increase in Johnson County. We examined county employment, earnings, and business establishments, overall and for the two major low-wage sectors, retail and “leisure and hospitality,” as well as overall unemployment, and retail sales in eating and drinking establishments. Despite the title of his column, he apparently found nothing wrong with any of these analyses. He takes us to task only for not focusing on restaurants, a subset of leisure and hospitality.
Our analysis relies on the best data available: the Department of Labor’s Quarterly Census of Employment and Earnings, and state sales tax data. Both come from an actual census of all private sector businesses, not a survey of a sample of businesses. To sort out the effects of the minimum wage you need to do what you can to control for other factors affecting the restaurant industry more broadly. That is why we compared the experience in Johnson County with the two other state regents’ institution counties, as well as neighboring Linn County, and the state as a whole, where the minimum wage remained unchanged.
What our analysis shows is that the average year-over-year growth rate of restaurant jobs in Johnson County fell from 3.5 percent for the four quarters prior to the wage increase, to 1.5 percent for the four quarters ending in the middle of 2017. Proof of a harmful minimum wage effect, as Mr. Saltsman would have us believe? Hardly. The growth rate in jobs in restaurants fell in the state of Iowa, and in all the comparison counties, only more so. While jobs in Iowa City restaurants grew on average at 1.5 percent per year post wage increase, they grew at only 0.3 percent in the state of Iowa and in Story County, 1.0 percent in Linn County, and fell 3.8 percent in Black Hawk. Furthermore, in all cases the growth rate was not only lower in the other areas, but fell more dramatically after 2015 than in Johnson County.
Perhaps Mr. Saltsman used a less reliable data source. Perhaps his math was wrong. Perhaps he did not choose to look at trends in restaurant jobs elsewhere, because that would have undercut his point. At any rate, it looks like we got it all right.
For more information about the minimum wage and local minimum wages in Iowa, see previous reports on IPP’s website.