Monthly market shares by crop and production area are shown in Table E. 11. Monthly

marketing for Mexico were estimated from import data on Mexican monthly vegetable

shipments.

 In Table E. 12, post harvest costs by crop and production area are presented. The costs

for Florida are based upon data derived from Smith and Taylor (1993). These costs included

harvesting, packing, marketing costs, and transportation from the production area to Wildwood,

Florida. In Figure E.2, the central point of each production area in Florida is depicted. The

costs for Mexico were based upon information provided in Van Sickle et al., (1994). Post

harvest costs in Mexico include the cost of harvest, packing, transportation to Nogales, Arizona,

and all applicable tariffs and fees incurred as the product crosses the border into the U.S. The

costs for peppers in Texas were provided by the Texas Extension Service, and the strawberry

post harvest cost in California was provided by the California Extension Service.


Solution of the Model

 The model was solved using GAMS on a 486-50 micro computer. Despite the large

number of endogenous prices, the model was easily solved on the micro computer.


Empirical Results

 The solution to the quadratic programming model included equilibrium prices and

quantity consumed by month and crop in each of the four markets, shipments by month and crop

from each supply region to each market, and the acres planted to each cropping system in each

supply region. The model performed reasonably well in replicating the observed pattern of