A Comparison of χ2, RFA and IRT Based Procedures in the Detection of DIF

Bias research began at the end of the 1960s anddeveloped rapidly in the following decades for obvioussocial and political reasons, and due to the importantimpact that this issue has on the field ofpsychological and educational measurement. Since then,several methods have been proposed for the study anddetection of item bias or differential itemfunctioning (DIF). This paper presents a simulationstudy comparing the potential of some of these methodsfor detecting DIF: two IRT-based techniques (area measures), three ²-based procedures (MantelHaenszel, Logit Model and Logistic Regression) and theRestricted Factor Analysis method. The results showthat the technique that appears to do the best job isthe Mantel Haenszel statistic. Moreover, all detectiontechniques tend to overidentify DIF items, that is,some of the items labeled with DIF may in fact bewithout DIF. This tendency is slightly reversed in theLogistic Regression procedure.     

Absorbing knowledge in the digital age: the key role of integration mechanisms in the context of crowdsourcing for innovation

The digital age offers unprecedented opportunities for firms to access new knowledge for innovation. Both academics and managers have identified crowdsourcing (CS) as one relevant way to do so. CS for innovation involves outsourcing problem-solving or creative tasks to the crowd. To benefit from CS, absorptive capacity (ACAP) is critical; this can be enhanced by prior knowledge and past experience with a partner. However, in the CS context, firms open themselves up to undefined, anonymous partners through the Internet, hence the development of ACAP becomes more difficult. The literature on ACAP describes how internal integration mechanisms encourage the absorption of knowledge but fails to clearly address the way in which uncommon knowledge is integrated. Although literature has acknowledged the beneficial role of a wider spectrum of influential internal and external mechanisms on uncommon knowledge, few empirical studies have addressed the distinctive effect of these mechanisms on the absorption of anonymous partners’ knowledge. To fill this gap, this study identifies relevant integration mechanisms and how they impact upon different ACAP dimensions in the CS context. Five case studies reveal the distinctive influence of integration mechanisms depending on the nature of the CS activity. Our results extend research on ACAP in the little studied digital open context, investigating the absorption of uncommon knowledge from unidentified partners. From a managerial perspective, this study shows that managers need to pay attention to integration mechanisms in order to support the absorption of knowledge from the crowd. More precisely, our study suggests that the main focus should not be on external mechanisms, but also on internal mechanisms. Finally, we open up a new theoretical debate on how these mechanisms should be combined.     

Optimal Monetary Policy in an Operational Medium‐Sized DSGE Model

We show how to construct optimal policy projections in Ramses, the Riksbank’s open‐economy medium‐sized dynamic stochastic general equilibrium model for forecasting and policy analysis. Bayesian estimation of the parameters of the model indicates that they are relatively invariant to alternative policy assumptions and supports our view that the model parameters may be regarded as unaffected by the monetary policy specification. We discuss how monetary policy, and in particular the choice of output gap measure, affects the transmission of shocks. Finally, we use the model to assess the recent Great Recession in the world economy and how its impact on the economic development in Sweden depends on the conduct of monetary policy. This provides an illustration on how Rames incoporates large international spillover effects.     

INFLATION STABILIZATION AND NOMINAL ANCHORS

This paper analyzes the choice of a nominal anchor in disinflation programs in chronic inflation countries. Both theory and evidence suggest several conclusions. (i) The recessionary effects associated with disinflation appear in the early stages of money-based programs but only in the late stages of exchange rate-based programs. (ii) Lack of credibility is more disruptive under fixed exchange rates than under floating exchange rates. (iii) Attempting to pursue a disinflationary policy while maintaining a given level of the real exchange rate is likely to be self-defeating. (iv) A high degree of currency substitution favors the exchange rate as the nominal anchor.     

Stradin: A Strategic Dynamic and Interactive Decision-Making Process

This article proposes a new strategic decision-making process: Stradin. Stradin uses recent developments in computerized network systems and user-friendly interfaces in order to address management challenges of corporations of the 1990s. Five strategic challenges are addressed: (1) finding the right balance in the centralization-decentralization dilemma; (2) conciliating strategic decisions and their operational implementation; (3) finding a balance between role differentiation and integration; (4) using conflict constructively in order to improve decision making; (5) conciliating emerging strategies and continuity. The article below discusses each of these challenges and shows how Stradin can help in meeting them.     

Recurrent unemployment,welfare benefits and heterogeneity

The objective of this paper is to investigate the causes of the recurrences of individuals in unemployment during benefit periods. So as to attain this objective, we use administrative data from the Spanish Employment Agency to estimate a duration model with multiple spells that allows for unemployment state dependence through lagged unemployment duration in order to distinguish the heterogeneity and scarring effects. We find that an increase in the duration of previous unemployment benefit periods lengthens the expected duration of future unemployment benefit periods. True state dependence and heterogeneity, intensity of job search and local labour market conditions are among the elements that explain this unemployment state dependence.     

Do Migrants Get Good Jobs? New Migrant Settlement in Australia*

The paper uses two cohorts of the longitudinal survey of immigrants to Australia data to study how changes in social security legislation in 1997 affected the quality of jobs held by new migrants. We use bivariate probit models to estimate the probabilities of holding a ‘good job’ in terms of the usual human capital and demographic variables (including visa category). Our results suggest that the policy change had a positive impact on the probability to find a job, but a negative impact to hold a good job.     

Business Cycle Synchronization between Euro Area and Central and Eastern European Countries

We analyze the degree of co‐movements in real macroeconomic aggregates across selected euro area and Central and Eastern European (CEE) countries applying a multi‐factor model. Our results suggest that the evolution of the global European factor matches well the narrative of main economic events between 1995 and 2011, capturing among others the recession during the recent global financial and economic crisis. This factor plays a central role in explaining real output growth variability in euro area and is negligible in CEE countries. Furthermore, using Markov switching models and concordance indices, we shed light on an increase in business cycle synchronization, with the degree of concordance between country‐specific and European business cycles being high.     

The Franco‐German trade puzzle: an analysis of the economic consequences of the Franco‐Prussian war1

When the Franco‐German trade relationship is viewed from a long‐term perspective, the conventional view that trade ties were rather good before 1914 becomes doubtful. In fact, trade statistics point to the absolute and relative decline in trade flows between the two countries after the Franco‐Prussian war of 1870–1. This postwar episode of Franco‐German trade history is far from incidental. On the basis of a comprehensive study of Franco‐German trade by product, this article reveals a complete restructuring of French trade with Germany after the conflict and invites a new analysis of its economic consequences.