Forecasting regional GDPs: a comparison with spatial dynamic panel data models
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DOI: 10.1080/17421772.2023.2199034
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- Anna Gloria Billé & Alessio Tomelleri & Francesco Ravazzolo, 2021. "Forecasting Regional GDPs: a Comparison with Spatial Dynamic Panel Data Models," FBK-IRVAPP Working Papers 2021-02, Research Institute for the Evaluation of Public Policies (IRVAPP), Bruno Kessler Foundation.
References listed on IDEAS
- Matías Mayor & Roberto Patuelli, 2012.
"Short-Run Regional Forecasts: Spatial Models through Varying Cross-Sectional and Temporal Dimensions,"
Advances in Spatial Science, in: Esteban Fernández Vázquez & Fernando Rubiera Morollón (ed.), Defining the Spatial Scale in Modern Regional Analysis, edition 127, chapter 0, pages 173-192,
Springer.
- MatÃas Mayor & Roberto Patuelli, 2012. "Short-Run Regional Forecasts: Spatial Models through Varying Cross-Sectional and Temporal Dimensions," Working Paper series 15_12, Rimini Centre for Economic Analysis, revised Oct 2012.
- M. Mayor-Fern ndez & R. Patuelli, 2012. "Short-Run Regional Forecasts: Spatial Models through Varying Cross-Sectional and Temporal Dimensions," Working Papers wp835, Dipartimento Scienze Economiche, Universita' di Bologna.
- Fidrmuc, Jarko & Degler, Moritz, 2021.
"Temporal And Spatial Dependence Of Interregional Risk Sharing: Evidence From Russia,"
Macroeconomic Dynamics, Cambridge University Press, vol. 25(1), pages 178-200, January.
- Jarko Fidrmuc & Moritz Degler, 2018. "Temporal and Spatial Dependence of Inter-Regional Risk Sharing: Evidence from Russia," Working Papers 373, Leibniz Institut für Ost- und Südosteuropaforschung (Institute for East and Southeast European Studies).
- Hoogstrate, Andre J & Palm, Franz C & Pfann, Gerard A, 2000. "Pooling in Dynamic Panel-Data Models: An Application to Forecasting GDP Growth Rates," Journal of Business & Economic Statistics, American Statistical Association, vol. 18(3), pages 274-283, July.
- Kelejian, Harry H. & Prucha, Ingmar R., 2010.
"Specification and estimation of spatial autoregressive models with autoregressive and heteroskedastic disturbances,"
Journal of Econometrics, Elsevier, vol. 157(1), pages 53-67, July.
- Harry H. Kelejian & Ingmar R. Prucha, 2008. "Specification and Estimation of Spatial Autoregressive Models with Autoregressive and Heteroskedastic Disturbances," CESifo Working Paper Series 2448, CESifo.
- Robert Lehmann & Klaus Wohlrabe, 2014.
"Regional economic forecasting: state-of-the-art methodology and future challenges,"
Economics and Business Letters, Oviedo University Press, vol. 3(4), pages 218-231.
- Robert Lehmann & Klaus Wohlrabe, 2014. "Regional Economic Forecasting: State-of-the-Art Methodology and Future Challenge," CESifo Working Paper Series 5145, CESifo.
- Benos, Nikos & Karagiannis, Stelios & Karkalakos, Sotiris, 2015. "Proximity and growth spillovers in European regions: The role of geographical, economic and technological linkages," Journal of Macroeconomics, Elsevier, vol. 43(C), pages 124-139.
- Kosfeld, Reinhold & Dreger, Christian, 2019.
"Towards an East German wage curve - NUTS boundaries, labour market regions and unemployment spillovers,"
Regional Science and Urban Economics, Elsevier, vol. 76(C), pages 115-124.
- Kosfeld, Reinhold & Dreger, Christian, 2017. "Towards an East German Wage Curve: NUTS Boundaries, Labour Market Regions and Unemployment Spillovers," IZA Discussion Papers 10892, Institute of Labor Economics (IZA).
- Reinhold Kosfeld & Christian Dreger, 2017. "Towards an East German Wage Curve - NUTS Boundaries, Labour Market Regions and Unemployment Spillovers," Discussion Papers of DIW Berlin 1675, DIW Berlin, German Institute for Economic Research.
- Reinhold Kosfeld & Christian Dreger, 2017. "Towards an East German wage curve - NUTS boundaries, labour market regions and unemployment spillovers," MAGKS Papers on Economics 201729, Philipps-Universität Marburg, Faculty of Business Administration and Economics, Department of Economics (Volkswirtschaftliche Abteilung).
- Marcellino, Massimiliano & Stock, James H. & Watson, Mark W., 2003.
"Macroeconomic forecasting in the Euro area: Country specific versus area-wide information,"
European Economic Review, Elsevier, vol. 47(1), pages 1-18, February.
- Massimiliano Marcellino & James H. Stock & Mark W. Watson, "undated". "Macroeconomic Forecasting in the Euro Area: Country Specific versus Area-Wide Information," Working Papers 201, IGIER (Innocenzo Gasparini Institute for Economic Research), Bocconi University.
- Baltagi, Badi H. & Bresson, Georges & Pirotte, Alain, 2012.
"Forecasting with spatial panel data,"
Computational Statistics & Data Analysis, Elsevier, vol. 56(11), pages 3381-3397.
- Baltagi B-H & Bresson G. & Pirotte A., 2007. "Forecasting with Spatial Panel Data," Working Papers ERMES 0710, ERMES, University Paris 2.
- Baltagi, Badi H. & Bresson, Georges & Pirotte, Alain, 2009. "Forecasting with Spatial Panel Data," IZA Discussion Papers 4242, Institute of Labor Economics (IZA).
- Nadim Ahmad, 2008. "A Proposed Framework for Business Demography Statistics," International Studies in Entrepreneurship, in: Emilio Congregado (ed.), Measuring Entrepreneurship, chapter 0, pages 113-174, Springer.
- Badi Baltagi & Dong Li, 2006.
"Prediction in the Panel Data Model with Spatial Correlation: the Case of Liquor,"
Spatial Economic Analysis, Taylor & Francis Journals, vol. 1(2), pages 175-185.
- Badi H. Baltagi & Dong Li, 2006. "Prediction in the Panel Data Model with Spatial Correlation: The Case of Liquor," Center for Policy Research Working Papers 84, Center for Policy Research, Maxwell School, Syracuse University.
- Pesaran, M. Hashem & Schuermann, Til & Smith, L. Vanessa, 2009.
"Forecasting economic and financial variables with global VARs,"
International Journal of Forecasting, Elsevier, vol. 25(4), pages 642-675, October.
- M. Hashem Pesaran & Til Schuermann & L. Vanessa Smith, 2008. "Forecasting Economic and Financial Variables with Global VARs," CESifo Working Paper Series 2263, CESifo.
- M. Hashem Pesaran & Til Schuermann & L. Vanessa Smith, 2008. "Forecasting economic and financial variables with global VARs," Staff Reports 317, Federal Reserve Bank of New York.
- Pesaran, M.H. & Schuermann, T. & Smit, L.V., 2008. "Forecasting Economic and Financial Variables with Global VARs," Cambridge Working Papers in Economics 0807, Faculty of Economics, University of Cambridge.
- Servén, Luis & Abate, Girum Dagnachew, 2020.
"Adding space to the international business cycle,"
Journal of Macroeconomics, Elsevier, vol. 65(C).
- Abate,Girum Dagnachew & Serven,Luis, 2019. "Adding Space to the International Business Cycle," Policy Research Working Paper Series 8786, The World Bank.
- Badi H. Baltagi & Dong Li, 2004. "Prediction in the Panel Data Model with Spatial Correlation," Advances in Spatial Science, in: Luc Anselin & Raymond J. G. M. Florax & Sergio J. Rey (ed.), Advances in Spatial Econometrics, chapter 13, pages 283-295, Springer.
- Konstantin Arkadievich Kholodilin & Boriss Siliverstovs & Stefan Kooths, 2008.
"A Dynamic Panel Data Approach to the Forecasting of the GDP of German Länder,"
Spatial Economic Analysis, Taylor & Francis Journals, vol. 3(2), pages 195-207.
- Konstantin A. Kholodilin & Boriss Siliverstovs & Stefan Kooths, 2007. "A Dynamic Panel Data Approach to the Forecasting of the GDP of German Länder," Discussion Papers of DIW Berlin 664, DIW Berlin, German Institute for Economic Research.
- Eric Girardin & Konstantin A. Kholodilin, 2011.
"How helpful are spatial effects in forecasting the growth of Chinese provinces?,"
Journal of Forecasting, John Wiley & Sons, Ltd., vol. 30(7), pages 622-643, November.
- Girardin, Eric & Kholodilin, Konstantin A., 2010. "How helpful are spatial effects in forecasting the growth of Chinese provinces?," BOFIT Discussion Papers 15/2010, Bank of Finland Institute for Emerging Economies (BOFIT).
- Badi H. Baltagi & Bernard Fingleton & Alain Pirotte, 2014.
"Estimating and Forecasting with a Dynamic Spatial Panel Data Model,"
Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 76(1), pages 112-138, February.
- Badi H. Baltagi & Bernard Fingleton & Alain Pirotte, 2011. "Estimating and Forecasting with a Dynamic Spatial Panel Data Model," SERC Discussion Papers 0095, Centre for Economic Performance, LSE.
- Badi H. Baltagi & Bernard Fingleton & Alain Pirotte, 2012. "Estimating and Forecasting With A Dynamic Spatial Panel Data Model," Center for Policy Research Working Papers 149, Center for Policy Research, Maxwell School, Syracuse University.
- Baltagi, Badi H. & Fingleton, Bernard & Pirotte, Alain, 2011. "Estimating and forecasting with a dynamic spatial panel data model," LSE Research Online Documents on Economics 58322, London School of Economics and Political Science, LSE Library.
- André Stel & Martin Carree & Roy Thurik, 2005.
"The Effect of Entrepreneurial Activity on National Economic Growth,"
Small Business Economics, Springer, vol. 24(3), pages 311-321, February.
- Andre van Stel & Martin Carree & Roy Thurik, "undated". "The effect of entrepreneurial activity on national economic growth," Papers on Entrepreneurship, Growth and Public Policy 2005-04, Max Planck Institute of Economics, Entrepreneurship, Growth and Public Policy Group.
- André van Stel & Roy Thurik & Martin Carree, 2005. "The effect of entrepreneurial activity on national economic growth," Scales Research Reports N200419, EIM Business and Policy Research.
- Rapach, David E. & Strauss, Jack K., 2012. "Forecasting US state-level employment growth: An amalgamation approach," International Journal of Forecasting, Elsevier, vol. 28(2), pages 315-327.
- Watson, Philip & Deller, Steven, 2017. "Economic diversity, unemployment and the Great Recession," The Quarterly Review of Economics and Finance, Elsevier, vol. 64(C), pages 1-11.
- Halleck Vega, Solmaria & Elhorst, J. Paul, 2016. "A regional unemployment model simultaneously accounting for serial dynamics, spatial dependence and common factors," Regional Science and Urban Economics, Elsevier, vol. 60(C), pages 85-95.
- Bernard Fingleton & Harry Garretsen & Ron Martin, 2015. "Shocking aspects of monetary union: the vulnerability of regions in Euroland," Journal of Economic Geography, Oxford University Press, vol. 15(5), pages 907-934.
- Baltagi, Badi H. & Griffin, James M., 1997. "Pooled estimators vs. their heterogeneous counterparts in the context of dynamic demand for gasoline," Journal of Econometrics, Elsevier, vol. 77(2), pages 303-327, April.
- Pesaran, M. Hashem & Schuermann, Til & Smith, L. Vanessa, 2009. "Rejoinder to comments on forecasting economic and financial variables with global VARs," International Journal of Forecasting, Elsevier, vol. 25(4), pages 703-715, October.
- Mitze, Timo & Naveed, Amjad & Ahmad, Nisar, 2016. "International, intersectoral, or unobservable? Measuring R&D spillovers under weak and strong cross-sectional dependence," Journal of Macroeconomics, Elsevier, vol. 50(C), pages 259-272.
- Simonetta Longhi & Peter Nijkamp, 2007. "Forecasting Regional Labor Market Developments under Spatial Autocorrelation," International Regional Science Review, , vol. 30(2), pages 100-119, April.
- Bego�a Cueto & Mat�as Mayor & Patricia Su�rez, 2015. "Entrepreneurship and unemployment in Spain: a regional analysis," Applied Economics Letters, Taylor & Francis Journals, vol. 22(15), pages 1230-1235, October.
- Manuel Arellano & Stephen Bond, 1991.
"Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations,"
The Review of Economic Studies, Review of Economic Studies Ltd, vol. 58(2), pages 277-297.
- Tom Doan, "undated". "RATS program to replicate Arellano-Bond 1991 dynamic panel," Statistical Software Components RTZ00169, Boston College Department of Economics.
- Mark W. Watson & James H. Stock, 2004. "Combination forecasts of output growth in a seven-country data set," Journal of Forecasting, John Wiley & Sons, Ltd., vol. 23(6), pages 405-430.
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- J. Paul Elhorst & Ioanna Tziolas & Chang Tan & Petros Milionis, 2024. "The distance decay effect and spatial reach of spillovers," Journal of Geographical Systems, Springer, vol. 26(2), pages 265-289, April.
- Luca Barbaglia & Lorenzo Frattarolo & Niko Hauzenberger & Dominik Hirschbuehl & Florian Huber & Luca Onorante & Michael Pfarrhofer & Luca Tiozzo Pezzoli, 2024. "Nowcasting economic activity in European regions using a mixed-frequency dynamic factor model," Papers 2401.10054, arXiv.org.
- Angelo Leogrande & Carlo Drago & Massimo Arnone, 2024.
"Analyzing Regional Disparities in E-Commerce Adoption Among Italian SMEs: Integrating Machine Learning Clustering and Predictive Models with Econometric Analysis,"
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- Leogrande, Angelo & Drago, Carlo & Arnone, Massimo, 2024. "Analyzing Regional Disparities in E-Commerce Adoption Among Italian SMEs: Integrating Machine Learning Clustering and Predictive Models with Econometric Analysis," MPRA Paper 122115, University Library of Munich, Germany.
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More about this item
JEL classification:
- C33 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Models with Panel Data; Spatio-temporal Models
- C52 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Evaluation, Validation, and Selection
- C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods
- E37 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Forecasting and Simulation: Models and Applications
- R11 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - Regional Economic Activity: Growth, Development, Environmental Issues, and Changes
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