margins. While Walmart has often been said to be a destroyer of small businesses, much of this is anecdotal. Research so far suggests that Walmart superstores have little effect on smaller retailers such as "Mom and Pop" businesses. A 2008 economic analysis published in the journal Economic Inquiry suggested that "the process of creative destruction unleashed by Wal‐Mart has had no statistically significant long‐run impact on the overall size and profitability of the small business sector in the United States." Impact appears to be related to a number of factors, with a key factor being the goods offered for sale. A study by Ailawadi and others (2010) examined the impact of new Walmarts in detail. She reported that median sales dropped 40 percent at similar high-volume stores, 17 percent at supermarkets and 6 percent at drugstores. However, 30 percent of specific product categories at high-volume stores were unaffected. Many retailers reduced prices and cut product selection in an attempt to compete directly with Walmart, in effect attacking its areas of strength. A more successful approach was to track sales, identify vulnerable categories, and increase the range of products in those categories. By including products at both top and bottom price points, and offering temporary promotions on those items, retailers could attract both customers who were price-conscious and those interested in a wider range of options. A small store that specialized in a particular product area could compete effectively against Walmart. Small specialized stores are less effective against big-box category killer chains such as Home Depot and Best Buy electronics. Some studies have suggested that the impact a Walmart store has on a local business is correlated to its distance from the store. David Merriman, Joseph Persky, Julie Davis and Ron Baiman (2012) outlined the impacts of Walmart in Chicago. Based on three annual surveys of enterprises within a four-mile radius of a new Chicago Walmart it "shows that the probability of going out of business was significantly higher for establishments close to that store". The overall findings of this study reinforce the "contention that large-city Walmarts, like those in small towns, absorb retail sales from nearby stores without significantly expanding the market". Ellickson & Grieco (2013) report in the Journal of Urban Economics that Wal-Marts most strongly affect outlets of larger chains that are within of their location. Effects on jobs A 2022 literature review concludes that "there is no