?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Sparse+demand+systems%3A+corners+and+complements&rft.creator=Lewbel%2C+A&rft.creator=Nesheim%2C+L&rft.description=We+propose+a+demand+model+where+consumers+simultaneously+choose+a+few+di%EF%AC%80erent+goods+from+a+large+menu+of+available+goods%2C+and+choose+how+much+to+consume+of+each+good.+The+model+nests+multinomial+discrete+choice+and+continuous+demand+systems+as+special+cases.+Goods+can+be+substitutes+or+complements.+Random+coe%EF%AC%83cients+are+employed+to+capture+the+wide+variation+in+the+composition+of+consumption+baskets.+Non-negativity+constraints+produce+corners+that+account+for+di%EF%AC%80erent+consumers+purchasing+di%EF%AC%80erent+numbers+of+types+of+goods.+We+show+semiparametric+identi%EF%AC%81cation+of+the+model.+We+apply+the+model+to+the+demand+for+fruit+in+the+United+Kingdom.+We+estimate+the+model%E2%80%99s+parameters+using+UK+scanner+data+for+2008+from+the+Kantar+World+Panel.+Using+our+parameter+estimates%2C+we+estimate+a+matrix+of+demand+elasticities+for+27+categories+of+fruit+and+analyze+a+range+of+tax+and+policy+change+scenarios.&rft.subject=sparse+demand%2C+discrete+choice%2C+continuous+choice%2C+fruit%2C+Tobit+model%2C+scanner+data%2C+complements&rft.publisher=Institute+for+Fiscal+Studies&rft.date=2019-09-23&rft.type=Working+%2F+discussion+paper&rft.language=eng&rft.source=++++(Cemmap+Working+Paper++45%2F19).+Institute+for+Fiscal+Studies%3A+London%2C+UK.+(2019)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10092128%2F1%2FCW4519-Sparse-demand-systems-corners-and-complements.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10092128%2F&rft.rights=open