Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Using the 2003 and 2008 Quality of Life Surveys, this paper identifies the factors that affect housing tenure decisions in Colombia. Households with higher incomes are more likely to purchase than to rent, and the choice of formal housing is positively associated with wealth. Households eligible for social housing subsidies are more likely to purchase than to rent, and those working in the informal sector are more likely to purchase informal dwellings. Subsidies and access to mortgage credit have a large positive impact on demand. Finally, savings have a positive effect on demand in 2008, but not in 2003. The positive effect on demand of both subsidies and credit is explained by demand for lowincome housing. Terms of use: Documents inJEL Classifications: G21, O54, R21, R28, R38, R58

This paper analyzes the recent behavior of prices of housing in Colombia and seeks to shed light on whether there is a misalignment of prices against the fundamentals that determine them. For that, two approaches were used: the first uses a structural VAR model to forecast within sample. The results suggest that currently observed prices are not misaligned if within the same fundamental determinants include the price of land. For the second approach we constructed a structural model of supply and demand for housing. The results of this model are consistent with the VAR model and suggest that any misalignment of housing prices on their fundamentals is associated with historically high land prices.

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The design, fabrication and measurement of a HEMT's, ultra-low noise, microwave, cryogenically-coolable amplifier is described.The design band covers from 2.1 to 2.5 Ghz and average noise temperature under 2.5k and gain over 25 dB have been measured for a two stage amplifier when cooled under 12.5k. Microwave Design System from HP and Pospieszalski HEMT's noise model have been used to do the design and excellent agreement has been verified between theoretical model and measured parameters. The amplifier has been done to work as an RF fist stage of a radio-astronomy receiver.