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<br />54 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />D. Recommendations <br /> <br />In summary, the following two procedures are recommended to reduce the impact of errors <br />and omissions in the NWS state damage estimates: <br /> <br />1. To determine the frequency of damaging floods in a state, establish a threshold above <br />which damage estimates are consistently provided and report the number of floods that have <br />exceeded the threshold. Our analysis indicates that reporting of state flood damages greater than <br />$1 million (in 1995 dollars) has been reasonably consistent since 1955, although state damages <br />in the $1 - 50 million range prior to 1990 occasionally went unreported. <br /> <br />2. To reduce the impact of errors and omissions in the estimates, increase the level of <br />aggregation; this can be done either by (a) using total damages in a state or states over an <br />extended period of years, or (b) computing damages for multi-state regions rather than using <br />individual states. This is especially important for statistical analysis of low vulnerability states. <br />