I looked at five different supermarkets in the New England Area - Walmart, Hannafords, Shaws, Market Basket and Whole Foods. My research into customer priorities indicated that they most valued low prices, high convenience, and valued healthy options as a third consideration. My estimates for market share were based on global trends and local data. I valued their price, convenience, and the availability of local options based on global trends, local data, and my own personal experiences at each chain.
As you can see on the maps below, Walmart dominates the market and distinguishes itself with low prices, high convenience. It has some healthy options, but not as many as it's competitors. Each brand clearly inhabits and caters to a unique market. For instance, the high prices and middling conveniences of a whole foods is balanced out by their healthy options. Hannafords and Shaws run closer to the middle of the map with reasonable offerings in each category, but less extreme distinguishing characteristics. I was particularly interested in Market Basket. Market Basket is a relatively new and unique company. They are a very convenient in store experience, but do not offer online orders. Their products are quite inexpensive (they even match or are lower than Walmart prices in many cases), but their availability of healthy options practically matches Whole Foods. Even though they are much smaller than the other brands on the list on a national scale, Market Basket has found a market in the New England area that they very successfully cater to.