Given the increasing use of panel data in testing hypotheses about labour market behaviour, it is essential that economists have a cound grasp of the problems involved in the collection of this type of data. This paper investigates the biases generated by recall errors and panel attrition, using...

Band spectral regression with deterministic and stochastic trends is considered. It is shown that conventional trend removal by regression in the time domain prior to bank spectral regression leads to biased and inconsistent estimates of the parameters in a model with frequency dependent...

Asymptotic analyses of unit root tests in autoregressive time series are usually based on the assumptions that the number of unit roots is known and that the remaining characteristic roots are stable. The last assumption seems not to be necessary. This is stated more precisely for two examples.

Explicit collusion is an agreement among competitors to suppress rivalry that relies on interfirm communication and/or transfers. Rivalry between competitors erodes profits; the suppression of rivalry through collusion is one avenue by which firms can enhance profits. Many cartels and bidding...

In this spirited and provocative book, Edward Leamer turns an examination of the Heckscher–Ohlin framework for global competition into an opportunity to consider the craft of economics: what economists do, what they should do, and what they shouldn’t do. Claiming “a lifetime relationship...

In this paper Kuznets' U-Curve hypothesis is tested on two unbalanced panel data sets of 47 and 62 countries, for the period 1970-93, using two-way fixed and random effects models. Several competing model specifications are estimated and the one best fitting the data is selected by appropriate...

Forecast combinations, also known as ensemble models, routinely require practitioners to select a model from a massive number of potential candidates. Ten explanatory variables can be grouped into 21078 forecast combinations, and the number of possibilities increases further to 21078+21078 if we...

This paper summarizes and assesses several of the most popular methods to seasonally adjust weekly data. The industry standard approach, known as X-13ARIMA-SEATS, is suitable only for monthly or quarterly data. Given the increased availability and promise of non-traditional data at higher...