• Brito, P.; Costa, L. & Dixon, H. (2013), Non-Smooth Dynamics and Multiple Equilibria in a Cournot-Ramsey Model with Endogenous Markups. Journal of Economic Dynamics and Control 37(11), 2287-2306.
• Afonso, A. & Costa, L. (2013). Market Power and Fiscal Policy in OECD Countries. Applied Economics  45(32), 4545-4555 - dataset.
• Costa, L. & Dixon, H. (2011). Fiscal Policy under Imperfect Competittion with Flexible Prices: An overview and survey. Economics: The Open-Access, Open-Assessment E-Journal  5(2011-3), 1-57.
• Costa, L. (2007). GDP Steady-state Multipliers under Imperfect Competition Revisited. Portuguese Economic Journal 6(3), 181-204.
• Costa, L. (2006). Entry and Fiscal Policy Effectiveness in a Small Open Economy within a Monetary Union. Portuguese Economic Journal 5(1), 45-65.
• Costa, L. (2004). Endogenous Markups and Fiscal Policy. The Manchester School  72(Supplement), 55-71.
• Costa, L. (2001). Can Fiscal Policy Improve Welfare in a Small Dependent Economy with Feedback Effects? The Manchester School  69(4), 418-439.

• Brito, P., Costa, L. & Dixon (2017). From Sunspots to Black Holes: Singular Dynamics in Macroeconomic Models. In Nishimura, K., Venditti, A. & Yannelis, N. (eds.) Sunspots and Non-Linear Dynamics: Essays in Honor of Jean-Michel Grandmont. Studies in Economic Theory Vol. 31. Heidelberg: Springer, pp. 41-70. [Working paper version available here.]
• Costa, L. & Dixon, H. (2013). A Simple Business-Cycle Model with Schumpeterian Features. In Lopes, J.C., Santos, J., St. Aubyn, M., & Santos, S. (eds.) Estudos de Homenagem a João Ferreira do Amaral [ Studies in Honour of João Ferreira do Amaral]. Coimbra: Almedina, pp. 747-779.
• Cunha, G. & Costa, L. (2013). Exploring the Literature on the Japanese Stagnation in the Nineties: A business-cycle-accounting approach. In Lopes, J.C., Santos, J., St. Aubyn, M., & Santos, S. (eds.) Estudos de Homenagem a João Ferreira do Amaral [ Studies in Honour of João Ferreira do Amaral]. Coimbra: Almedina, pp. 467-498.

• Santos, C., Costa, L., & Brito, P. (2021). Demand, Supply, and Markup Fluctuations. SSRN Working Papers 3872965.
• Brito, P., Costa, L., & Dixon, H. (2007). Business Cycles with Endogenous Mark-up. Money Macro and Finance Research Group Conference 2006 108.

Diretor do  Portuguese Economic Journal (jan. 2015 - presente).

Notas editoriais:

• Costa, L. & Dias, D. (2021). Editors' Note. Portuguese Economic Journal  20(1), 1-3.
• Costa, L. & Hoernig, S. (2020). Editors' Note. Portuguese Economic Journal 19(1), 1-3.
• Costa, L. & Rodrigues, P. (2019). Editors' Note. Portuguese Economic Journal 18(1), 1-3.
• Costa, L. & Duarte, M. (2017). Editors' Note. Portuguese Economic Journal 16(3), 145-147.
• Costa, L. & Guimarães, P. (2016). Editors' Note. Portuguese Economic Journal 15(3), 129-130.
• Costa, L. (2015). Editorial Note. Portuguese Economic Journal 14(1-3), 1-4.

Números especiais:

• Alves, R.P., Costa, L. & Hoernig, S. (2019). Economic policy in Portugal: innovation, competitiveness, and internationalisation.  Portuguese Economic Journal   18(3).

Revisor ( referee) das revistas: Australian Economic Papers,  De Economist, Economic Journal, Economics Bulletin, European Economic Review  (antes de 2003) , Japanese Economic Review, Journal of Macroeconomics, Journal of Mathematical Economics, Journal of Public Economic Theory, Macroeconomic Dynamics, Manchester School, Portuguese Economic Journal (antes de 2015).

• Claeys, P. & Costa, L. (2012).  A Note on the Relationship between the Cyclicality of Markups and Fiscal Policy.  IREA of Universitat de Barcelona Working Papers   2012/15.
• Costa, L. & St. Aubyn, M. (2012).  The Macroeconomic Effects of Legal-Simplification Programmes.  ISEG of Univ Tecn Lisboa, Department of Economics Working Papers 12/2012/DE/UECE.
• Costa, L. & Palma, N. (2007). Comment on 'Productive Public Expenditure and Imperfect Competition with Endogenous Price Markup'. MPRA Papers 5143.
• Costa, L. (1992). Estudo Econométrico para o Mercado Monetário em Portugal (1977-1990). Cadernos de Económicas - Departamento de Economia ISEG of Univ Tecn Lisboa  29/92.

• Investigador responsável de "Poder de Mercado, Flutuações, e Fricções Financeiras" (2018-2021), PTDC/EGE-ECO/28814/2017 financiado pela  Fundação para a Ciência e a Tecnologia. Outros investigadores no projecto:  Paulo Brito , Cláudia Custódio,  Huw Dixon,  Carlos Santos e João Costa Filho.
• Investigador de "Dinâmica Industrial, Markups e Dinâmica Macroeconómica" (2010-2013), PTDC/EGE-ECO/104659/2008 financiado pela Fundação para a Ciência e a Tecnologia. Outros investigadores no projecto:  Paulo Brito (IR), Huw Dixon e Carlos Santos.
• Investigador responsável de "Estrutura de Mercado, Entrada e Macroeconomia," POCTI/ECO/46580/2002 financiado pela Fundação para a Ciência e a Tecnologia e co-financiado pelo FEDER. Outros investigadores no projecto: Paulo Brito e Huw Dixon.

• modelos dinâmicos de equilíbrio geral;
• política orçamental;
• ciclos económicos;
• interacções entre a organização industrial e a macroeconomia;
• macroeconomia em economia aberta.