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A GUIDE TO RETAIL IMPACT STUDIES <br />while adding grocery store space quite comparable to existing merchants. <br />medium <br />most confident forecast of the ability of the new merchant to reduce leakage through import <br />substitution and nonresident spending for each broad line of goods. In the case of the <br />supercenter described above, for example, the increase in electronics offerings may be <br />expected to lead to a real increase in local spending on electronics, while new grocery space <br />may be expected to primarily divert spending from existing stores. Although derived from solid <br />data and careful analysis, these are forecasts and are best expressed within ranges. <br />The base year for the analysis is the most recent 12 months for which credible retail sales data <br />is available. This approach provides a demonstrated and conservative foundation for <br />of population, demographics, and economics should be drawn from government sources such <br />as state data centers and regional planning bodies. If the community is experiencing or <br />expected to experience growth or decline in population and income, associated increases or <br />decreases in retail sales should be incorporated into the impact forecast for future years. <br />The example below is drawn from an actual study, in which the proposed retailer was forecast <br />to increase total retail sales by adding retail offerings that were previously absent in the impact <br />area. <br />MARKET SHARE FORECAST <br />GROCERY <br />Year 1Year 5Year 10 <br />LowMediumHighLowMediumHighLowMediumHigh <br />VariableSales Diverted from Other Merchants3%5%7%3%5%7%3%5%7% <br />Sales WITHOUT New Retailer ($ Millions)22.922.922.923.123.123.123.223.223.2 <br />Sales <br />Sales WITH New Retailer ($ Millions)24.325.226.224.425.426.324.125.526.4 <br />GENERAL MERCHANDISE <br />Year 1Year 5Year 10 <br />LowMediumHighLowMediumHighLowMediumHigh <br />VariableSales Diverted from Other Merchants25%15%5%25%15%5%25%15%5% <br />Sales WITHOUT New Retailer ($ Millions)10.410.410.410.510.510.510.610.610.6 <br />Sales <br />Sales WITH New Retailer ($ Millions)13.814.314.713.914.314.81414.414.9 <br />TOTAL <br />Year 1Year 5Year 10 <br />LowMediumHighLowMediumHighLowMediumHigh <br />Sales WITHOUT New Retailer ($ Millions)33.333.333.333.633.633.633.833.833.8 <br />Sales <br />Sales WITH New Retailer ($ Millions)38.139.540.938.339.741.138.139.941.3 <br />The table on the following page, from a 1993 impact analysis prepared on behalf of the state of <br />Vermont for a proposed retail development in the town of St. Albans, shows the amount of the <br />proposed retailer's projected sales that are forecast to be recaptured retail sales (i.e., reduced <br />leakage), nonresident spending from people living outside the county and in Canada, and <br />revenue redirected from existing businesses in the county. <br />17 <br /> <br />