Inmar's Willard Bishop Analytics is frequently quoted and featured in articles all over the country. See the latest articles below. Recent Articles Trader Joe's sees more monthly shoppers than Whole Foods, study finds While prices, selection and philosophy may be doing more to bring shoppers to the California-based retailer known for its unique private label products now, the battle is far from over. The case for charging rich and poor shoppers different prices These economists argue that retailers should charge people different prices for basic items based on their income levels. Here's why.