Social and organisational implications of CAD usage: a grounded theory in a fashion company

This paper focuses on the process of Computer Aided Design (CAD) diffusion into a group engaged in the development of innovative products. Adopting an ethnographic approach, we build a grounded theory for interpreting CAD usage in terms of the interplay between variables such as management orientation, training, actors' specialisation and deskilling, availability of shared archives, technological discontinuities between organisational areas.     

PRACTITIONERS' CORNER:Triangular Representation and Error Correction Mechanism in Cointegrated Systems

ABSTRACT In this paper we provide a proof of the ‘Granger representation theorem’ starting from Phillips' triangular representation of a cointegrated system. Proofs of the theorem have already been provided but starting either from the MA representation or from the AR representation. Conversely, we derive and characterize analytically the MA and the AR representations in terms of the parameters of the triangular system.     

Domestic and Foreign Price/Marginal-cost Margins: an Application to Spanish Manufacturing Firms

The authors investigate the differences in margins of export and domestic markets for Spanish manufacturing firms in the period 1990 to 1997. They estimate jointly a multiproduct cost function, a variable factor share equation, and two price/marginal‐cost margin equations. The results indicate that the marginal cost of production sold in export markets is slightly greater than in domestic markets. At the same time, the price/marginal‐cost margins in export markets are smaller than in domestic markets. There is also strong evidence that margins are procyclical in domestic markets, but this evidence is less clear in foreign markets.     

Markups,Bargaining Power and Offshoring: An Empirical Assessment1

This paper tests the pro‐competitive effect of imports on product and labour markets for Spanish manufacturing firms in the period 1990–2005. In doing so, it takes into account the type of imported products: final versus intermediate. Markups are estimated following the procedure suggested by Roeger and including an efficient bargaining model. The observed heterogeneity among firms is parametised to consider additional product standardisation and market concentration. The results support the imports as market discipline hypothesis for importers of final goods, while firms that offshore intermediate inputs show similar markups to nonimporters. Additionally, the union bargaining power is smaller for importers and the more homogeneous is the type of goods elaborated by firms.     

Decomposing the growth in residential land in the United States

This paper decomposes the growth in land occupied by residences in the United States to give the relative contributions of changing demographics versus changes in residential land per household. Between 1976 and 1992 the amount of residential land in the United States grew 47.7% while population only grew 17.8%. At first glance, this suggest an important role for per-household increases. However, the calculations in this paper show that only 24.5% of the growth in residential land area can be attributed to state-level changes in land per household. 37.3% is due to overall population growth, 22.6% to an increase in the number of households over this period, 6% to the shift of population towards states with larger houses, and the remaining 9.6% to interactions between these changes. There are large differences across states and metropolitan areas in the relative importance of these components.     

Rhetorical History as Institutional Work

Rhetorical history has emerged as a useful theoretical construct that bridges the long recognized gap between historical and organizational scholarship. Despite its growing popularity, the precise nature of rhetorical history as a construct, its scope conditions, and its utility in resolving critical issues in historical organizational analysis remains unclear. This paper addresses these issues. We define rhetorical history and contextualize the construct by elaborating its relationship to associated concepts like collective memory, rhetoric, and narrative. We ground the construct by reviewing literature that has applied rhetorical history in both theory and empirical research. Our inductive review identifies four recurring themes in which rhetorical history is used to construct perceptions of; (a) continuity and discontinuity, (b) similarity and difference, (c) winners and losers, and (d) morality and immorality. We conclude with a discussion of how rhetorical history is an essential mechanism of institutional work.     

A confirmatory analysis of the unit root hypothesis for OECD consumption-income ratios

This article investigates the existence of a unit root in the consumption-income ratio for a sample of 23 OECD countries over the period 1960 to 2005. For that purpose, we first use recently developed unit root tests with good size and power. Second, we employ the more powerful panel unit root tests of Pesaran (2003 Pesaran, MH. 2003. A Simple Panel Unit Root Test in the Presence of Cross-Section Dependence mimeo, Cambridge University [Google Scholar]) and Smith et al . (2004) that take the null of nonstationarity and a bootstrap version of the test of Hadri (2000 Hadri, K. 2000. Testing for stationarity in heterogeneous panel data. The Econometrics Journal, 3: 148–61. [Crossref] , [Google Scholar]) that takes stationarity as the null hypothesis. Overall, our confirmatory analysis renders clear-cut evidence that OECD consumption-income ratios contain a unit root.     

A virtual voyage through 3D structures generated by chaotic mixing of magmas and numerical simulations: a new approach for understanding spatial and temporal complexity of magma dynamics

In this contribution, we present a virtual voyage through 3D structures generated by chaotic mixing of magmas and numerical simulations with the aim to highlight the power of 3D representations in the understanding of this geological phenomenon. In particular, samples of mixed juveniles from Salina island (Southern Italy) are reconstructed in 3D by serial lapping and digital montage and numerical simulations are performed by using a 3D chaotic dynamical system. Natural and simulated magma mixing structures are visualized by using several multimedia tools including animations and “virtual reality” models. It is shown that magma interaction processes can generate large spatial and temporal compositional heterogeneities in magmatic systems. The same topological structures are observed in both 3D reconstructed rock samples and chaotic numerical simulations, indicating that the mixing of magmas is governed by chaotic dynamics. The use of 3D multimedia models gives the opportunity to penetrate into magma mixing structures and to understand their significance in the context of magma dynamics. Such an approach is very powerful since multimedia tools can strongly capture the attention of the reader bringing him/her into an interactive and memorable geological experience.