Poland's agricultural sector under transformation

The Polish agricultural sector and food processing industry was the first industry to follow market economy because of agriculture's significance in the Polish economy and the dominant role of private ownership in agriculture. Full price liberalization, internal convertibility of the Polish currency, and liberalization of foreign trade completely changed the situation in agriculture. The main objective of this paper is to test the existence of market processes using monthly data from the agriculture and food processing industry covering the time period 1990–92. The largest part of the estimation is dedicated to agricultural products' and foodstuffs' prices. Typical demand-supply relations are observed on the pig, cattle, and milk markets only. In many equations, such variables like imports and exports of agricultural goods are not significant.     

Evolutionary models in economics: a survey of methods and building blocks

This paper assesses methods and components of formal evolutionary-economic modelling. Methods are broadly classified into evolutionary game theory and selection dynamics, evolutionary computation and multi-agent models, each with relevant subcategories. The components or building blocks are organized into diversity, innovation, selection, bounded rationality, diffusion, path dependency and lock-in, coevolution, multilevel and group selection, and mechanisms of growth. The number of alternatives that has been proposed for each category is vast, making it difficult to comprehend the variety of assumptions and formalizations underlying existing evolutionary-economic models. Our survey aims to clarify for each model component the choice range, formal expressions, associated assumptions, and possible techniques for formalization. Our study is unique in that it provides more information about the formal details of specific model components and is considerably more inclusive than earlier reviews.     

Responses to monetary policy shocks in the east and the west of Europe: a comparison

This paper compares impulse responses to monetary policy shocks in the euro area countries before the EMU and in the New Member States (NMS) from central–eastern Europe. We mitigate the small‐sample problem, which is especially acute for the NMS, by using a Bayesian estimation that combines information across countries. The impulse responses in the NMS are broadly similar to those in the euro area countries. There is some evidence that in the NMS, which have had higher and more volatile inflation, the Phillips curve is steeper than in the euro area countries. This finding is consistent with economic theory. Copyright © 2009 John Wiley & Sons, Ltd.     

Entrepreneur and the state-managed economy under socialism

The paper deals with institutional change in Poland. The accompanying pherlomenon is an escalating wave of entrepreneurial ventures. They take on different legal forms. The most popular, limited liability companies, emerge in the private, the cooperative, and the state sectors, and often across these sectors. These developments give rise to new interest groups which generally support a market reform. The conflict between the market oriented sector and the administered sector becomes one of the main factors influencing the economic policies of the state. In the paper, the development of the private sector is analyzed with the use of measures relating to the proportion of revenues from the private sector in the total state budget revenues.     

“Tourism – Common cause”. Polish tourist products

This research note relates to the Polish programme entitled “Tourism – common cause”. It describes the programme, project ideas and problems encountered during the creation and operation of tourist products and methods of solving these problems. “Tourism – common cause” is the largest training and consulting project in Poland, co-financed by the European Social Fund and the Polish government and is specific for tourism. The aim of the project (completed in March 2008) was to fully define a tourism product and to transfer knowledge concerning methods of its creation throughout the wider region. The purpose was to aid the development of the tourism industry in Poland through the creation of regional tourism products within a network and enhancing the qualifications of those working in the industry.     

The merger of populations, the incidence of marriages, and aggregate unhappiness

Let a society??s unhappiness be measured by the aggregate of the levels of relative deprivation of its members. When two societies of equal size, F and M, merge, unhappiness in the merged society is shown to be higher than the sum of the levels of unhappiness in the constituent societies when apart; merger alone increases unhappiness. But when societies F and M merge and marriages are formed such that the number of households in the merged society is equal to the number of individuals in one of the constituent societies, unhappiness in the merged society is shown to be lower than the aggregate unhappiness in the two constituent societies when apart. This result obtains regardless of which individuals from one society form households with which individuals from the other, and even when the marriages have not (or not yet) led to income gains to the married couples from increased efficiency, scale economies, and the like. While there are various psychological reasons for people to become happier when they get married as opposed to staying single, the very formation of households reduces social distress even before any other happiness-generating factors kick in.     

Constraint programming for project-driven manufacturing

Project-driven manufacturing, based on the make-to-order or the build-to-order principle and predominant in small and medium-size enterprises (SMEs), calls for an efficient solution of large combinatorial problems, especially in such areas as task scheduling or resource management. This paper addresses the problem of finding a computationally effective approach to scheduling a new project subject to constraints imposed by a multi-project environment. A constraint programming (CP) modeling framework is discussed in the context of an efficient decomposition of the constraint satisfaction problem (CSP) and the evaluation of strategies for pruning the search tree. The proposed approach is illustrated through examples of its application to the evaluation of a new production order.