Tourism forecasting: accuracy of alternative econometric models

This study evaluates the forecasting accuracy of six alternative econometric models in the context of the demand for international tourism in Denmark. These econometric models are special cases of a general autoregressive distributed lag specification. In addition, the forecasting accuracy of two univariate time series models is evaluated for benchmark comparison purposes. The forecasting competition is based on annual data on inbound tourism to Denmark. Individual models are estimated for each of the six major origin countries over the period 1969–93 and forecasting performance is assessed using data for the period 1994–97. Rankings of these forecasting models over different time horizons are established based on mean absolute percentage error and root mean square percentage error.     

An econometric model of internal migration and development: extensions and tests

The author extends a previous work on migration in Italy "from 1958-1976 to 1958-1981, tests for the stability of the model and its coefficients, and uses the model for policy simulations and forecasting. The model performs as well over the extended sample period as over the original period and, even more important..., the model is found to be quite stable. This is remarkable in view of the economic turmoil that characterized the years by which the original sample period was extended."     

Econometric tests of alternative scale variables in money demand in open economies: International evidence from selected OECD countries

The choice of the scale variable in the money demand function is important because of its striking implications on the magnitude and direction of the domestic monetary and fiscal policy effects and effectiveness of international policy coordination. In this study several tests are applied to the money demand functions of Japan, Germany, Canada, France, and Italy in an open economy context to determine the appropriate scale variable for each country. Both narrow and broad definitions of money are used. Income, disposable income, consumption, private spending, and domestic absorption are investigated as contenders for the scale variable. The findings indicate that the scale variable is country-specific, rather than universal, and it is sensitive to the definition of money.     

Fertility and female employment dynamics in Europe: the effect of using alternative econometric modeling assumptions

We investigate the direct and long‐run effects of fertility on employment in Europe, estimating dynamic models of labor supply under different assumptions regarding the exogeneity of fertility and modeling assumptions related to initial conditions, unobserved heterogeneity and serial correlation in the error terms. We find overall large direct and long‐run effects of giving birth on employment probabilities, and these effects differ considerably across countries. We find that within countries the results are sensitive to the statistical assumption made on initial conditions, the inclusion of serial correlation and the assumption of strict exogeneity of children. However, the pattern across countries is robust to these assumptions. We show that such patterns are largely consistent with prevailing institutional differences related to the flexibility of the labor markets and family policies. Copyright © 2009 John Wiley & Sons, Ltd.     

Specification and estimation of spatial econometric models: A discussion of alternative strategies for spatial economic modelling

The semantical insufficiency of (spatial) economic theories necessitates the making of additional assumptions — thereby introducing substantial specification uncertainty — in order to arrive at a fully specified econometric model. The traditional or current approach to econometric modelling treats specification uncertainty inadequately. This proposition is illustrated by two well-known examples from the spatial economic literature. Two alternative specification strategies for spatial economic modelling — designed to improve the current spatial econometric modelling approach — are proposed. One of these strategies is used for a specification analysis of agricultural output in Eire.     

Some tests of alternative urban population density functions

The purpose of this study is to test the usefulness of some alternative gross population density functions for urbanized areas. Two evaluation criteria are used; maximum explanatory power in standard regression analysis and accuracy in predicting total population in the urbanized area. It is concluded that the explanatory power of the negative exponential function can be improved upon in some cases by adding a quadratic distance term, but that population can be predicted more accurately if the quadratic term is omitted. Also, it is found that constraining the negative exponential function to predict population exactly reduces explanatory power by an insignificant amount.     

Simple tests of alternative specifications in stochastic frontier models

Previous work on stochastic production frontiers has generated a family of models, of varying degrees of complexity. Since this family is nested (in the sense that the more general models contain the less general), we can test the restrictions that distinguish the model. In this paper we provide tests of these restrictions, based on the results of estimating the simpler (restricted) models. Some of our tests are LM tests. However, in other cases the LM test fails, so we provide alternative simple tests.     

Comparing alternative tests of causality in temporal systems: Analytic results and experimental evidence

This paper discusses eight alternative tests of the absence of casual ordering, all of which are asymptotically valid under the null hypothesis in the sense that their limiting size is known. Their behavior under alternatives is compared analytically using the concept of approximate slope, and these results are supported by the outcomes of Monte Carlo experiments. The implications of these comparisons for applied work are unambiguous: Wald variants of a test attributed to Granger, and a lagged dependent variable version of Sim's test introduced in this paper, are equivalent in all relevant respects and are preferred to the other tests discussed.     

西方国家政府绩效审计发展述评

本文回顾了西方国家政府绩效审计的发展历程,并对以澳大利亚、英国为代表的西方国家的政府绩效审计的特点进行了分析,最后得出了几点启示.     

Efficiency externalities of trade and alternative forms of foreign investment in OECD countries

The literature on the spillover effects of trade and inflows of foreign direct investment (FDI) has concentrated on technological externalities. Little effort has been directed towards identifying their efficiency externalities. This paper measures the efficiency externalities of trade and various forms of foreign investment for a sample of 20 OECD countries between 1982 and 2000 using a stochastic frontier approach. Trade and all foreign investment inflows are found to enhance efficiency, whereas outflows of FDI are found to exacerbate inefficiency. The efficiency externalities from foreign investment are contingent on the absorptive capacity of the host economies. Copyright © 2008 John Wiley & Sons, Ltd.     

Evaluating the forecasting performance of econometric models of air passenger traffic flows using multiple error measures

Airline traffic forecasting is important to airlines and regulatory authorities. This paper examines a number of approaches to forecasting short- to medium-term air traffic flows. It contributes as a rare replication, testing a variety of alternative modelling approaches. The econometric models employed include autoregressive distributed lag (ADL) models, time-varying parameter (TVP) models and an automatic method for econometric model specification. A vector autoregressive (VAR) model and various univariate alternatives are also included to deliver unconditional forecast comparisons. Various approaches for taking into account interactions between contemporaneous air traffic flows are examined, including pooled ADL models and the enhanced models with the addition of a “world trade” variable. Based on the analysis of a number of forecasting error measures, it is concluded that pooled ADL models that include the “world trade” variable outperform the alternatives, and in particular univariate methods; and, second, that automatic modelling procedures are enhanced through judgmental intervention. In contrast to earlier results, the TVP models do not improve accuracy. Depending on the preferred error measure, the difference in accuracy may be substantial.     

The permanent income hypothesis in five major industrial countries: a multivariate trend-cycle decomposition test

This paper presents a new test of the permanent income hypothesis in five major industrial countries. The test first decomposes consumption and income into their long run trend (permanent) and short run cyclical (transitory) components, using the recently developed multivariate stochastic detrending approach developed by Vahid and Engle (1997), among others. This approach exploits the presence of possible common stochastic trends and cycles among the variables in the system to arrive at a more efficient decomposition of these variables. Using the decomposition results, and in contrast to many articles in the literature, the paper finds support for the permanent income hypothesis. Specifically, the paper finds that, while permanent consumption is related to permanent income, transitory consumption is related to neither permanent nor transitory income.

世界主要发达国家物联网的发展现状

物联网技术是目前各国重点发展的网络技术。各国相继制定了物联网发展的规划战略,加快推进下一代网络基础设施的建设步伐。文章主要介绍了美国、欧盟、日本、韩国和新加坡5个国家和地区的物联网发展现状,以期为我国的物联网发展提供借鉴。     

The performance of alternative forecasting methods for SETAR models

We compare a number of methods that have been proposed in the literature for obtaining h-step ahead minimum mean square error forecasts for self-exciting threshold autoregressive (SETAR) models. These forecasts are compared to those from an AR model. The comparison of forecasting methods is made using Monte Carlo simulation. The Monte-Carlo method of calculating SETAR forecasts is generally at least as good as that of the other methods we consider. An exception is when the disturbances in the SETAR model come from a highly asymmetric distribution, when a Bootstrap method is to be preferred.An empirical application calculates multi-period forecasts from a SETAR model of US gross national product using a number of the forecasting methods. We find that whether there are improvements in forecast performance relative to a linear AR model depends on the historical epoch we select, and whether forecasts are evaluated conditional on the regime the process was in at the time the forecast was made.     

Bootstrapping the process of model selection: AN econometric example

If a researcher has mined the data (i.e. selected an empirical model based on a series of trial estimates), inferences based on the final set of results are in general incorrect. This note treats the entire data mining process as an estimator and shows how a bootstrapping technique may improve the quality of inference. The method is applied to an empirical example on the deterrent effects of capital punishment.     

The impact of ambidexterity on enterprise performance: Evidence from 15 countries and 14 sectors

The assumption made by research on ambidexterity is that enterprises operating ambidextrously perform better as a result. Similarly, the beneficial effects of ambidexterity are often assumed to be invariant across different contexts, such as sector. However, as is widely acknowledged in the literature, there is a paucity of evidence on which to base these assumptions. To address this issue, in this note we examine evidence from the Community Innovation Survey covering 15 countries and 45,113 enterprises. The paper shows a strong, positive effect on growth in sales turnover from ambidexterity in the manufacturing and the scientific and technical services sectors.     

The performance effects of major workforce reductions: longitudinal evidence from North America

This paper investigates the performance effects of major job cuts.1 1 Like Wayhan and Werner (2000 Wayhan, V. and Werner, S. 2000. The Impact of Workforce Reductions on Financial Performance: A Longitudinal Perspective. Journal of Management, 26: 341–63. [Crossref] , [Google Scholar]), we interchangeably use the expressions ‘workforce reduction’ and ‘job cuts’ instead of the broad concept of ‘downsizing’ which is subject to multiple confusing definitions (DeWitt, 1998 DeWitt, R.L. 1998. Firm Industry and Strategy Influences on Choice of Downsizing Approach. Strategic Management Journal, 19: 59–79.  [Google Scholar]). Using data from Compustat S&P database, we examined the longitudinal impact of workforce reductions on labour productivity and operational indebtedness of 239 US and Canadian companies. Repeated measures analysis showed that firms that substantially cut jobs failed to improve their labour productivity and their operational indebtedness. Then, taken a step further, statistical analysis surprisingly revealed that firms that cut the highest proportions of their workforce had a significant deterioration of their operational indebtedness and a non-significant change of their labour productivity. These results call into question the economic legitimacy of major workforce reductions increasingly institutionalized to the detriment of the strategic approach of HRM.     

The effects of corruption on growth performance of the mena countries

This article aims at testing the effects of institutional characteristics on growth in countries of the Middle East and North Africa (MENA) region. For this purpose we consider conditional convergence in terms of initial conditions, macroeconomic performance, trade openness, government size, natural resource abundance and institutional and political structures for a sample of 90 countries over the period 1960–2000. We use regional indicators and MENA-specific variables in order to test for the effects of each variable on the growth performance of the MENA economies. We highlight the direct and indirect impacts of both corruption and bureaucratic quality on the MENA growth compared to the other regions of the world.