Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

A large check list is used, asking the shipper about .
his shipment policies and desires. If a certain number of
questions are answered in the affirmative, a more thorough
investigation of air freight possibilities should be
undertaken.
Essentially the SRI report was a surrender to the non-
quantifiers. All attempts to have an empirical analysis
had been fruitless and will continue to be so, concluded SRI.
Researchers in the area criticized the report for this
conclusion and suggested that its value was in pointing out
the parameters to be considered in future empirical analyses. 21
While transport economics has been citing the inelasticity
of transport demand, 22 all writers in air freight have
emphasized the elasticity of the demand for air freight. 23
Brewer is typical when he states, "The presence of
substantial elasticity in the demand curve for air trans-
portation is well recognized." 24 Sealy and Herdon estimate
the elasticity to be 1.7. 25 Echard estimates an elasticity
of 3.0. 26
21 See [103], [113].
22 See [95] pp. 82-97, and [99] pp. 174-176.
23 See [127] p. 6; [29] p. 82; [94] p. 31;[73] pp. 106-107.
24 Stanley Brewer, Vision in Air Cargo, (Seattle, Bureau of
Business Research, University of Washington, 1960), p. 13.
25 Quoted from Alan Stratford Air Transport Economics in the
Supersonic Era, (New York, St. Martin's Press, 1967), p. 221.
26 E.W. Echard, Free World Air Cargo: 1965-1980 Rate Elasticity
Forecast, (Commercial Marketing Research Department, CMRS 77,
Lockheed Georgia Co., June, 1967), p. 3.
16