Bubbly collateral and economic activity

This paper develops a model of the bubbly economy and uses it to study the effects of bailoutpolicies. In the bubbly economy, weak enforcement institutions do not allow firms to pledge futurerevenues to their creditors. As a result, "fundamental" collateral is scarce and this impairs the intermediationprocess that transforms savings into capital. To overcome this shortage of "fundamental"collateral, the bubbly economy creates "bubbly" collateral. This additional collateral supports anintricate array of intra- and inter-generational transfers that allow savings to be transformed intocapital and bubbles. Swings in investor sentiment lead to fluctuations in the amount of bubblycollateral, giving rise to bubbly business cycles with very rich and complex dynamics.Bailout policies can affect these dynamics in a variety of ways. Expected bailouts provideadditional collateral and expand investment and the capital stock. Realized bailouts reduce thesupply of funds and contract investment and the capital stock. Thus, bailout policies tend to fosterinvestment and growth in normal times, but to depress investment and growth during crisis periods.We show how to design bailout policies that maximize various policy objectives.

Human capital, the structure of production and growth

Do high levels of human capital foster economic growth by facilitating technology adoption? If so, countries with more human capital should have adopted more rapidly the skilled-labor augmenting technologies becoming available since the 1970 s. High human capital levels should therefore have translated into fast growth in more compared to less human-capital-intensive industries in the 1980 s. Theories of international specialization point to human capital accumulation as another important determinant of growth in human-capital-intensive industries. Using data for a large sample of countries, we find significant positive effects of human capital levels and human capital accumulation on output and employment growth in human-capital-intensive industries.

I just ran four million regressions

In this paper I try to move away from the Extreme Bounds method ofidentifying ``robust'' empirical relations in the economic growth literature.Instead of analyzing the extreme bounds of the estimates of the coefficientof a particular variable, I analyze the entire distribution. My claimin this paper is that, if we do this, the picture emerging from theempirical growth literature is not the pessimistic ``Nothing is Robust''that we get with the extreme bound analysis. Instead, we find that asubstantial number of variables can be found to be strongly relatedto growth.

The effect of unemployment spells on subsequent wages in Spain

In our analysis we try and recover the wage loss from unemploymentin Spain and see how it is affected by previous unemploymentexperience, unemployment duration, eligibility for unemploymentbenefits, and previous wages. We also study its variations acrossgroups. Our main conclusion is that while there is some evidencethat labour market rigidities tend to lower it, the wage loss ofdisplaced workers is remarkably high: more than 30%, that is,twice the equivalent figure for the US and France. Wages in Spainsuffer from a serious mismeasurement problems that we do our best tocontrol, so that our results are less robust than the ones thatwould be obtained with better data sets. However, they indicate a large level of wage flexibility in Spain.

Business cycle measurement with some theory

A method to evaluate cyclical models not requiring knowledge of the DGP and the exact specificationof the aggregate decision rules is proposed. We derive robust restrictions in a class of models; use someto identify structural shocks in the data and others to evaluate the class or contrast sub-models. Theapproach has good properties, even in small samples, and when the class of models is misspecified. Themethod is used to sort out the relevance of a certain friction (the presence of rule-of-thumb consumers)in a standard class of models.

Voting after the bombing: Can terrorist attacks change the outcome of democratic elections?

Economists have recently turned their attention to the effects of terrorism. One much debated effect of terrorist attacks is its impact on the results of democratic elections. We use the electoral consequences of the terrorist attacks of the 11-M in Madrid to analyze this issue. We consider this particular experiment since the attack took place only three days before the 2004 Congressional Election, which allows the use of credible identification criteria. In particular, we use the advance voting by Spanish residents abroad, who cast their vote before the terrorist attack, to identify the effect of the bombing. We exploit this macabre natural experiment to run a difference-in-differences estimation using data on three consecutive Congressional elections. Our empirical results indicate that a terrorist attack can have a large impact on the outcome of democratic elections.

Aggregate fluctuations and the network structure of intersectoral trade

This paper analyzes the flow of intermediate inputs across sectors by adopting a network perspective on sectoral interactions. I apply these tools to show how fluctuationsin aggregate economic activity can be obtained from independent shocks to individualsectors. First, I characterize the network structure of input trade in the U.S. On thedemand side, a typical sector relies on a small number of key inputs and sectors arehomogeneous in this respect. However, in their role as input-suppliers sectors do differ:many specialized input suppliers coexist alongside general purpose sectors functioningas hubs to the economy. I then develop a model of intersectoral linkages that can reproduce these connectivity features. In a standard multisector setup, I use this modelto provide analytical expressions linking aggregate volatility to the network structureof input trade. I show that the presence of sectoral hubs - by coupling productiondecisions across sectors - leads to fluctuations in aggregates.

La política monetaria europea y sus posibles repercusiones sobre la economía española

La política monetaria llevada a cabo por parte de la Reserva Federaly el Bundesbank durante los últimos años puede caracterizarse con bastante precisión mediante una regla de tipo de interés como la propuesta por Taylor (1994). La forma que toma la regla de Taylor es similar a la de la regla óptima de política monetaria que se obtiene como solución del problema de un banco central preocupado por estabilizar la inflación y el producto, en el contexto de un modelo keynesiano convencional. Esta propiedad, junto con el éxito notable de las autoridades monetarias alemanas y norteamericanas en el mantenimiento sostenido de un nivel de inflación bajo y estable, justifican el uso de la regla de Taylor como una primera aproximación al comportamiento esperado y deseable por parte del banco central de un país industrializado y, por lo tanto, a la futura política monetaria del BCE.Teniendo tal consideración como punto de partida, se ha llevado a cabo una evaluación de las posibles repercusiones de la integración en la UME sobre la economía española. Dicha evaluación se ha basado en tres ejercicios complementarios: (a) el análisis de la experiencia española a partir de la entrada en el SME, (b) el comportamiento de un índicede tensión monetaria que refleja las discrepancias entre el tipo de interés generado por la regla de Taylor para la Unión Europea y para España, y (c) la simulación de un modelo estructural.Por lo general, los resultados de dichos ejercicios sugieren que los costes para la economía española de renunciar a una política monetaria propia deberían ser muy limitados, por lo menos en la medida en que (a) el BCE siga una política monetaria consistente con la regla de Taylor, y (b) el grado de sincronización del ciclo económico y la inflación española con sus homólogos europeos sea parecido al observado en el pasado reciente. Cabe esperar que los costes de la integración monetaria tomen la forma de una mayor volatilidad del producto y de la inflación, resultante de una mayor persistencia en los efectos de los shocks de oferta y demanda domésticos. Estos costes deberían contrastarse con las ventajas de pertenecer a la unión monetaria europea que son independientes del grado de estabilidad macroeconómica (baja inflación, aumento de la competencia, contribución a la integración política, etc....).Dicha conclusión podría modificarse si se produjese en un futuro una disminución significativa en el grado de correlación entre shocks domésticos (a nivel de España) y shocks agregados (a nivel de la UME), aunque no hay motivo para anticipar un cambio en tal sentido. En cualquier caso, el presente trabajo sugiere un simple indicador (el índice de tensión monetaria desarrollado en la Sección 5), que nos permitirá cuantificar la medida en que la política monetaria del BCE se ajusta a las necesidades e intereses de la economía española.

Geographical effects on the accuracy of textile trade data:an international approach for 1913

Foreign trade statistics are the main data source to the study of international trade.However its accuracy has been under suspicion since Morgernstern published hisfamous work in 1963. Federico and Tena (1991) have resumed the question arguing thatthey can be useful in an adequate level of aggregation. But the geographical assignmentproblem remains unsolved. This article focuses on the spatial variable through theanalysis of the reliability of textile international data for 1913. A geographical biasarises between export and import series, but because of its quantitative importance it canbe negligible in an international scale.

Turbulence and unemployment in a job matching model

According to Ljungqvist and Sargent (1998), high European unemployment since the 1980s can be explained by a rise in economic turbulence, leading to greater numbers of unemployed workers with obsolete skills. These workers refuse new jobs due to high unemployment benefits. In this paper we reassess the turbulence-unemployment relationship using a matching model with endogenous job destruction. In our model, higher turbulence reduces the incentives of employed workers to leave their jobs. If turbulence has only a tiny effect on the skills of workers experiencing endogenous separation, then the results of Lungqvist and Sargent (1998, 2004) are reversed, and higher turbulence leads to a reduction in unemployment. Thus, changes in turbulence cannot provide an explanation for European unemployment that reconciles the incentives of both unemployed and employed workers.

International Update, December 2007/January 2008

News from the Iowa International Trade Team

Audit report on Community Colleges for International Development, Inc., Cedar Rapids, Iowa for the year ended June 30, 2007

Audit report on Community Colleges for International Development, Inc., Cedar Rapids, Iowa for the year ended June 30, 2007

Input chains and industrialization

A key aspect of industrialization is theadoption of increasing-returns-to-scale, industrial,technologies. Two other, well-documented aspects arethat industrial technologies are adopted throughoutintermediate-input chains and that they use intermediateinputs intensively relative to the technologies theyreplace. These features of industrial technologiescombined imply that countries with access to similartechnologies may have very different levels ofindustrialization and income, even if the degree ofincreasing returns to scale at the firm level is relativelysmall. Furthermore, a small improvement in theproductivity of industrial technologies can trigger full-scaleindustrialization and a large increase in income.