?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Fpure.iiasa.ac.at%2Fid%2Feprint%2F4116%2F&rft.title=Viability+in+a+Keynesian+Model%3A+A+Preliminary+Approach&rft.creator=Cartelier%2C+J.&rft.creator=Muellers%2C+K.&rft.description=The+purpose+of+this+paper+is+to+study+an+elementary+dynamic+Keynesian+model+by+means+of+the+viability+approach.+The+mathematical+theory+of+viability+allows+one+to+raise+and+answer+questions+which+cannot+be+solved+with+usual+dynamic+tools.+It+deals+with+the+question+whether+for+a+given+dynamical+system%2C+there+can+be+found+solutions+which+satisfy+some+a+priori+given+constraints%2C+and+with+the+analysis+of+subsets+of+the+phase+space+where+viable+evolutions%2C+i.e.%2C+evolutions+satisfying+the+given+constraints%2C+are+possible.+Equilibria+are+examples+of+such+viable+sets%2C+but+the+viability+approach+is+much+more+general+then+the+equilibrium+approach.+In+contrast+to+traditional+ecodynamics+where+local+stability+and+asymptotic+properties+of+models+are+the+heart+of+the+matter%2C+the+viability+approach+is+concerned+with+contingent+evolutions+over+time+of+dynamic+systems.+%0D%0A%0D%0AIn+section+2+we+describe+an+elementary+dynamic+Keynesian+model.+Viability+questions+are+evoked+in+section+3+along+with+some+intuitive+answers%2C+and+rigorous+results+and+developments+will+be+found+in+section+4.&rft.publisher=WP-94-095&rft.date=1994-09&rft.type=Monograph&rft.type=NonPeerReviewed&rft.format=text&rft.language=en&rft.identifier=https%3A%2F%2Fpure.iiasa.ac.at%2Fid%2Feprint%2F4116%2F1%2FWP-94-095.pdf&rft.identifier=++Cartelier%2C+J.+%3Chttps%3A%2F%2Fpure.iiasa.ac.at%2Fview%2Fiiasa%2F1792.html%3E+%26+Muellers%2C+K.+%3Chttps%3A%2F%2Fpure.iiasa.ac.at%2Fview%2Fiiasa%2F2213.html%3E++(1994).++Viability+in+a+Keynesian+Model%3A+A+Preliminary+Approach.+++IIASA+Working+Paper.+IIASA%2C+Laxenburg%2C+Austria%3A+WP-94-095+++++