Stretching figures strains credibility

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I recently read that the Wichita Airport’s economic impact was estimated at $1.6 billion per year. I thought this seemed high, so I investigated further.

I became aware of this study prepared by the Center for Economic Development and Business Research at Wichita State University, available here: Wichita Mid-Continent Airport Economic Impact.

By reading this study I learned that the employees of Cessna and Bombardier — 12,134 in total — are counted in determining the economic impact of the airport. Why? To quote the study: “While it might appear that manufacturing businesses could be based anywhere in the area, both Cessna and Bombardier require a location with runways and instrumentation structures that allow for flights and flight testing of business jet airplanes.” This is true, but it is quite a stretch to attribute the economic impact of these employees to the airport.

For one thing, if we count the economic impact of the income of these employees as belonging to the airport, what then do we say about the economic impact of Cessna and Bombardier? We would have to count it as very little, because the impact of their employees’ earnings has been assigned to the airport. This is, of course, assuming that we count the impact of these employees only once.

Or suppose that Cessna tires of being on the west side of town, so it moves east and starts using Jabara Airport. Would Cessna’s economic impact on Sedgwick County be any different? I think it wouldn’t. But its impact on the Wichita airport would now be zero. Similar reasoning would apply if Cessna built its own runway.

Or it may be that someday Cessna or Bombardier will ask Sedgwick County for some type of economic subsidy, and they will use these same economic impact dollars in their justification. But these dollars will have already been used, as they were attributed to the airport.

To its credit, the WSU study does provide some figures with the manufacturing employees excluded. The impact without the manufacturing employees included is estimated at $183 million, or about 11 percent of the $1.6 billion claimed earlier.

It is a convenient circumstance that these two manufacturers happen to be located near the airport. To credit the airport with the economic impact of these companies — as though the airport was involved in the actual manufacture of airplanes instead of providing an incidental (but important) service — is to grossly overstate the airport’s role and its economic importance.

Of course the airport is important to Wichita. We should seek to measure its impact sensibly instead of stretching to attribute every dollar possible to it. When advocates of any cause manufacture figures like the $1.6 billion economic impact, it casts doubt on other arguments they advance.

Links referred to: Wichita Mid-Continent Airport Economic Impact

Comments

2 responses to “Stretching figures strains credibility”

  1. […] economic development figures need to be looked at closely. In 2005, I noted in the article Stretching figures strains credibility that the Center for Economic Development and Business Research has overstated the case before. In […]

  2. […] there’s a problem with these numbers. They’re similar to sensational claims made a few years ago when the case for subsidizing airlines in Wichita was made. Those figures — as are the […]

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