An analysis of the available information of years 2006 and 2007 at diverse sources independences, institutions and commercialization systems of cattle in Sonora was made. Weanalyzed international price fluctuation data of corn with base in information of stock-marketof Chicago. From the previous...

At present companies are trying hard to reduce productive assets by reducing general expensesand increasing flexibility toward what they call “lean production”. For this reason they arehiring specialized companies under long term agreements in order to supply parts, operations,and services,...