Saint-Petersburg State University
Author list of organization
List of articles written by the authors of the organization
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SINGULAR GROWTH IN AN INTEGRATED ASSESSMENT MODEL BASED ON A MODIFICATION OF THE SOLOW MODEL
DescriptionA modified version of the Solow model with endogenous technical progress is considered that exerts “explosive”, singular growth. A formula for the point of time of singularity is derived. The model is “upgraded” to a climate–economy model (an Integrated Assessment model) describing the growth of the world economy under conditions of global climate change. A non-trivial stationary solution of the model is obtained. It is shown that this solution is unstable, and that the developed model manifests “explosive growth” like the initial modification of the Solow model
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STOCHASTIC DYNAMICS OF PRICES IN A MODEL OF FINANCIAL MARKET WITH DIFFERENT TYPES OF NOISE TRADERS
DescriptionIn the present study, the calculations of price dynamics are made in the model of a financial market consisting of fundamentalist and noise traders. Numerical calculations are carried out in accordance with the full Walrasian dynamic price adjustment rule. To describe fluctuations in the number of optimistic and pessimistic noise traders, a seminal stochastic Kirman’s ant model (reducible to a Markov chain) is used, as well as its modification with different scaling properties of the parameter controlling the strength of herding behavior of noise agents
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Description
The Structural Dynamic Economic Model SDEM-2 is essentially a model of a closed economy growing under conditions of conflict of interests of two powerful aggregate actors: entrepreneurs and wage-earners. We study the economic growth within SDEM-2 both in system dynamic and optimization model setups. For the system dynamic model setup, four alternative control strategies of entrepreneurs are considered in detail: the “altruistic” control strategy, the “moderate output growth” control strategy, the “here and now” control strategy, and the “moderate dividend growth” control strategy. In the optimization setup the Pontryagin's maximum principle is applied to SDEM-2 to solve the linear and logarithmic utility maximization problems. The degree of sub-optimality of system dynamic solutions is evaluated
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THEORY OF SOCIAL MOTIVATION AS TOOL TO INCREASE SOCIAL PERFORMANCE IN SUB-SAHARAN COMPANIES
DescriptionThis article is about the theory of social motivation as a tool to increase social performance in Sub Saharan countries. So in the first part we will retell the theoretical understanding of motivation and its limits and then the explanation of the concept of social motivation as an alternative to complete the existing and old form of motivation. The second part of the article will talk about social performance and how to measure it. Several techniques are available for measuring performance of an employee. But the difference is in the sources of traits or qualities to be appraised. Jobs are different and have different requirements and different opinion of the management too. The practice is difficult sometime because of different kinds of workers (factory workers, executives or salespeople), which cannot be measured with the same indicators all the time. In this article we will see some theoretical and practical models of performance appraisal based on effectiveness and efficiency at work with concrete indicators. Also the readers will understand how social motivation, when well used in a company can increase the performance and transform the work place into a livelihood place for all stakeholders. And the article will end with the conclusion in which we have a piece of advice and literature references
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01.00.00 Physical-mathematical sciences
DescriptionA simple climate–economic model based on the AK model of economic growth with the endogenous depreciation rate linear in temperature and on the exogenous climate scenario with temperature linear in time is considered. The analytical solution of the model is obtained. The uncertainty of temperature projections is introduced in the model, and the moments of model state variable are calculated analytically. Numerical examples are provided