Objectives: Identifying the salinity tolerance and phenotype of the rice lines which carrying the Saltollocus (donor plant), imported from International Rice Research Institute, as well as selecting the popularly grown rice cultivar were used as the recipient plant Applying marker assisted backcrossing (MABC) to pyramid salinity tolerance Saltol locus into Bac Thom 7, in order to generate the high quality rice variety with salinity tolerance for growing the coastal areas in Red River Delta.

Competition in Product Variety: Theory and Evidence I begin by describing the allocation of effectiveness in illustrative equilibria, then describe the simulation and its results. Finally, at the end of this section I return to the basic model to discuss its allocative implications and the likely effects of endogenizing school effectiveness.