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- Publications
- Influence
The core-periphery model with three regions and more
- S. Castro, João Correia-da-Silva, Pascal Mossay
- Physics
- 15 July 2011
We determine the properties of the core-periphery model with three regions and compare our results with those of the standard 2-region model. The conditions for the stability of dispersion and… Expand
State-owned enterprises as indirect instruments of entry regulation
- A. Brandão, S. Castro
- Economics
- 6 November 2007
In the context of mixed markets, Matsumura and Kanda (J Econ 84(1): 27–48, 2005) show that social welfare in free entry equilibrium is maximized when there exists a public firm in the market. En… Expand
Symmetry-breaking as an origin of species
- J. Buescu, S. Castro, Ap Dias, Isabel S. Labouriau
- Biology
- 2003
A central problem in evolutionary biology is the occurrence in the fossil record of new species of organisms. Darwin's view, in The Origin of Species, was that speciation is the result of gradual… Expand
- 14
- 2
Hexagonal projected symmetries.
- J. Oliveira, S. Castro, Isabel S. Labouriau
- Mathematics, Medicine
- Acta crystallographica. Section A, Foundations…
- 2 February 2015
In the study of pattern formation in symmetric physical systems, a three-dimensional structure in thin domains is often modelled as a two-dimensional one. This paper is concerned with functions in… Expand
Agglomeration patterns in a multi-regional economy without income effects
- J. M. Gaspar, S. Castro, João Correia-da-Silva
- Economics
- 1 December 2018
We study the long-run spatial distribution of industry using a multi-region core–periphery model with quasi-linear log utility Pflüger (Reg Sci Urban Econ 34:565–573, 2004). We show that a… Expand
Bifurcation, Symmetry and Patterns
- J. Buescu, S. Castro, A. Dias, I. Labouriau
- Mathematics
- 2003
Foreword by the Editors.- Organizing Committee.- Invited Speakers.- Invited Lectures.- Symmetry-Breaking as an Origin of Species.- Bifurcation and Planar Pattern Formation for a Liquid Crystal.-… Expand
A heteroclinic network in mode interaction with symmetry
- S. Castro, I. Labouriau, O. Podvigina
- Mathematics
- 1 September 2010
We study a robust heteroclinic network existing in generic mode interactions of symmetric dynamical systems. Each mode lies in C 3 and is equivariant under the action of D 6 ⋉ T 2 × Z 2. With this… Expand
Public Firms in a Dynamic Third Market Model
- S. Castro, A. Brandão
- Business
- 2001
We set the third market model in a dynamic context to decide whether a country can achieve benefits by subsidizing a public rm's exports. We use calculus of variations with the constraint that the… Expand
- 5
The Footloose Entrepreneur Model with 3 Regions
- J. M. Gaspar, S. Castro, João Correia-da-Silva
- Economics
- 1 July 2013
We study a 3-region version of the Footloose Entrepreneur model by Forslid and Ottaviano (J Econ Geogr, 2003). We focus on the analysis of stability of three types of long-run equilibria:… Expand
- 7
- PDF
Direct Perturbations of Aggregate Excess Demand
- S. Castro, Sami Dakhlia, P. Gothen
- Economics
- 30 November 2009
We complement the Sonnenschein-Mantel-Debreu results by establishing that an exchange economy, i.e., preferences and endowments, that generates a given aggregate excess demand (AED) function is close… Expand