The paper proposes a model to investigate the influences of agglomeration on heterogeneous firms' exporting behaviors. In the model, firms are heterogeneous in productivity. Selection effect and agglomeration economies caused by agglomeration increase firms' productivity and decreases industrial...

As cities play important roles in economic growth, the competitive power of foreign trade of cities has gained more and more attentions. Exporting hazard rate, as one dimension of foreign competitive power, shall be specifically measured. And its spatial distribution across cities shall be...

An extended single-index model is considered when responses are missing at random. A three-step estimation procedure is developed to define an estimator for the single index parameter vector by a joint estimating equation. The proposed estimator is shown to be asymptotically normal. An iterative...

Consider a setting where a treatment that starts at some point during a spell (e.g. in unemployment) may impact on the hazard rate of the spell duration, and where the impact may be heterogeneous across subjects. We provide Monte Carlo evidence on the feasibility of estimating the distribution...

Building on a complete account of registered unemployment spells in Norway, we study how the composition of unemployment has developed over the last ten years. The total volume of unemployment has become more unequally distributed than before, but it is difficult to identify the ‘losers’ in...

The decision by firms to offer an occupational pension is investigated with a unique linked employer-employee dataset, supplemented with detailed actuarial calculations of the cost to the firms of offering occupational pensions and constructed tax gains from pension contributions versus cash...

The application of continuous time Weibull models on discrete unemployment duration data may produce bias in the estimated shape of the hazard rate. The bias can be substantial even for weekly duration data, and it is seriously aggravated if the Weibull model is erroneously mixed with a Gamma...

We present new Monte Carlo evidence regarding the feasibility of separating causality from selection within non-experimental interval-censored duration data, by means of the nonparametric maximum likelihood estimator (NPMLE). Key findings are: i) the NPMLE is extremely reliable, and it...

Building on register data describing monthly labour market status for the whole Norwegian population 1992-95, we estimate grouped competing risk hazard rate models for transitions between employment, unemployment and non-participation. The models impose no parametric restrictions on either...

We conduct extensive Monte Carlo experiments on non-parametric estimations of duration models with unknown duration dependence and unknown mixing distribution for unobserved heterogeneity. We propose a full non-parametric maximum likelihood approach, based on time-varying lagged explanatory...