Fractional integration and business cycle features

We show in this article that fractionally integrated univariate models for GDP lead to a better replication of the main business cycle characteristics. We firstly show that the business cycle features are clearly affected by the degree of integration as well as by the other short run (AR, MA, etc.) components of the series. Then, we model the real GDP in the UK and the US by means of fractionally ARIMA (ARFIMA) model, and show that the time series can be specified in terms of this type of model with orders of integration higher than one but smaller than two. Comparing the ARFIMA specifications with those based on ARIMA models, we show via simulations that the former better describe the business cycles features of the data.Jel classification: C12, C15, C22The authors want to thank two anonymous referees for wise remarks. We have also benefited from questions and comments of the attendances at the econometric seminar of the Humboldt Universität zu Berlin and the ESEM2001 congress in Lausanne. Remaining errors and omissions are ours. All correspondence to: Luis A. Gil-Alana.First version received: February 2002/Final version received: December 2002     

Fiscal policy in good and bad times

In this paper we analyze whether the effect of fiscal policy differs across the business cycle. To tackle this question, we use a regime-switching error-correction framework, where nonlinearities are only modeled in the short-run and have no impact on the long-run equilibrium. Regime specific shocks to government revenue and government purchases are identified using sign restrictions. Linear combinations of the impulse responses of these basic shocks are used to construct a deficit-spending shock and a deficit-financed tax-cut shock. We find that active spending policies have a stronger impact in recession, with multipliers exceeding unity, and should be preferred to deficit-financed tax-cuts.     

Relative Capital Shortage and Potential Output Constraint: A Gap Approach

Focusing on core‐infrastructure capital vis‐à‐vis productive capital, we propose a macroeconomic method to estimate their optimal utilisation ratio in production and their relative shortage in any period. The method is based on an adapted two‐gap model, estimated via linear programming, with application to Chile and Mexico over the 1950–2000 period. Core infrastructure appears to support a variable level of productive investment, relative capital shortage alternating and imposing constraints on potential output over time. This suggests an optimal investment trade off, based on a social opportunity cost that derives from the prevailing gap in any period.     

Optimal Monetary Policy, Taxes, and Public Debt in an Intertemporal Equilibrium

This article is devoted to a study of the optimal monetary and fiscal policies within the framework of an overlapping generations model with cash-in-advance constraints. We first characterize the intertemporal equilibrium. Then we show how to decentralize the optimal growth path using available policy instruments (i.e., labor income and capital taxes, public debt, money supply). Between the four instruments: wages and capital taxes, debt and monetary policy, one is redundant among the three last which implies that the Friedman Rule is only a special case.     

Mean Reversion of Short‐run Interest Rates in Emerging Countries*

In this paper we examine the stochastic behavior of short‐run interest rates in several emerging countries using fractional integration techniques. We allow for a much richer flexibility in the dynamic behavior of the series than the classical representations based on I(0) or I(1) processes. It appears that for Singapore and Thailand nominal interest rates are mean‐reverting, whereas for Mexico, Malaysia, the Philippines, and Korea, the presence of a unit‐root test depends on the assumptions regarding the residuals’ autocorrelation. The results also suggest that uncovered interest parity (UIP) can only hold for two emerging countries. For the other countries, the stabilization policies in the aftermath of the currency crises have led to the rejection of the UIP hypothesis.     

A dynamic priority rule for scheduling against due-dates

We simulate the performance of a simple production system in which due-dates are set internally. We investigate priority rules aimed at minimizing tardiness, emphasizing a “modified duedate rule” which functions effectively in conjunction with internally-set deadlines and which adapts to both tight and loose conditions in the due-dates. This rule is simple and logical, and shows considerable promise for application in complex production systems.     

Ethnographic Accounting Research: Field Notes from the Frontier

Ethnographic fieldwork in accounting is scarce and remains a “frontier” methodology, unfamiliar to most accounting researchers. Building on our field research project on corporate accountability and stakeholder engagement, set in the Canadian Arctic, we illustrate in this article the use and explanatory power of ethnographic methods for studying social groups and individual actors in the broader accounting universe. We share our fieldwork strategies and provide a few practical tips for conducting ethnographic research in both corporate and community environments. We then argue that ethnographies provide accounting researchers with untapped opportunities to discover vast reservoirs of knowledge inaccessible to other research methods, and offer a path to humanize accounting research.