In my research I study the mathematical properties of dynamic economic models and their solutions. These models include dynamic optimization problems,
dynamic games,
and dynamic competitive equilibrium models. In terms of application areas I focus on macroeconomics (especially economic growth theory
and monetary policy)
and
resource economics.
G. Sorger: Entscheidungstheorie bei Unsicherheit, Lucius-Lucius (2000).
G. Sorger: Minimum impatience theorems for recursive economic models, Springer-Verlag (1992).
Selected journal articles
G. Sorger: Discounted dynamic optimization and Bregman divergence, Journal of Mathematical Economics110 (2024), 102935.
A. Kalk, G. Sorger: Climate policy under political pressure, Journal of Environmental Economics and Management122 (2023), 102900.
G. Sorger: On the dynamics of stock price bubbles: comments on a model by Miao and Wang, Central European Journal of Operations Research 28 (2020), 521-537.
H. Gersbach, G. Sorger, C. Amon: Hierarchical growth: basic and applied research, Journal of Economic Dynamics and Control90 (2018), 434-459.
P. Pichler, G. Sorger: Delegating climate policy to a supranational authority: a theoretical assessment, European Economic Review101 (2018), 418-440.
G. Sorger: Cycles and chaos in the one-sector growth model with elastic labor supply, Economic Theory, 65 (2018), 55-77.
T. Mitra, G. Sorger: Extinction in common property resource models: an analytically tractable example, Economic Theory57 (2014), 41-57.
S. Niemann, P. Pichler, G. Sorger: Central bank independence and the monetary instrument problem, International Economic Review54 (2013), 1031-1055.
T. Mitra, G. Sorger: On Ramsey's conjecture, Journal of Economic Theory148 (2013), 1953-1976.
G. Sorger: Horizontal innovations with endogenous quality choice, Economica78 (2011), 697-722.
G. Sorger: Strategic saving decisions in the infinite-horizon model, Economic Theory36 (2008), 353-377.
G. Sorger: Time-preference and commitment, Journal of Economic Behavior and Organization62 (2007), 556-578.
G. Sorger: Recursive Nash bargaining over a productive asset, Journal of Economic Dynamics and Control30 (2006), 2637-2659.
N.V. Long and G. Sorger: Insecure property rights and growth: the role of appropriation costs, wealth effects, and heterogeneity,
Economic Theory, 28 (2006), 513-529.
G. Sorger: Active and passive monetary policy in an overlapping generations model, Review of Economic Dynamics8 (2005), 731-748.
G. Sorger: A dynamic common property resource problem with amenity value and extraction costs, International Journal of Economic Theory1 (2005), 3-19.
G. Sorger: Consistent planning under quasi-geometric discounting, Journal of Economic Theory118 (2004), 118-129.
C. Ghiglino, G. Sorger: Poverty traps, indeterminacy, and the wealth distribution, Journal of Economic Theory105 (2002),
120-139.
G. Sorger: On the long-run distribution of capital in the Ramsey model, Journal of Economic Theory105 (2002), 226-243.
V. Bala, G. Sorger: A spatial-temporal model of human capital accumulation, Journal of Economic Theory96 (2001),
153-179.
T. Mitra, G. Sorger: Rationalizing policy functions by dynamic optimization, Econometrica67 (1999), 375-392.
J. Hofbauer, G. Sorger: Perfect foresight and equilibrium selection in symmetric potential games, Journal of Economic Theory85 (1999), 1-23.
C. Hommes, G. Sorger: Consistent expectations equilibria, Macroeconomic Dynamics2 (1998), 287-321.
G. Sorger: Markov-perfect Nash equilibria in a class of resource games, Economic Theory11 (1998), 79-100.
L. Montrucchio, G. Sorger: Topological entropy of optimal policy functions in concave dynamic optimization models,
Journal of
Mathematical Economics25 (1996), 181-194.
G. Sorger: On the structure of Ramsey equilibrium: cycles, indeterminacy, and sunspots, Economic Theory4 (1994), 745-764.
K. Nishimura, M. Yano, G. Sorger: Ergodic chaos in optimal growth models with low discount rates, Economic Theory4 (1994), 705-717.
G. Sorger: Period three implies heavy discounting, Mathematics of Operations Research19 (1994), 1007-1022.
G. Sorger: On the minimum rate of impatience for complicated optimal growth paths, Journal of Economic Theory56 (1992), 160-179.
G. Sorger: Competitive dynamic advertising: a modification of the Case game, Journal of Economic Dynamics and Control13 (1989), 55-80.
G. Sorger: On the optimality and stability of competitive paths in continuous time growth models, Journal of Economic Theory48 (1989), 526-547.