Can banks default overnight? Modelling endogenous contagion on the O/N interbank market

We propose a new model of the liquidity-driven banking system focusing on overnight interbank loans. This significant branch of the interbank market is commonly neglected in the banking system modelling and systemic risk analysis. We construct a model where banks are allowed to use both the interbank and the securities markets to manage their liquidity demand and supply as driven by prudential requirements in a volatile environment. The network of interbank loans is dynamic and simulated every day. We show how the intrasystem cash fluctuations alone, without any external shocks, may lead to systemic defaults, and what may be a symptom of the self-organized criticality of the system. We also analyze the impact of different prudential regulations and market conditions on the interbank market resilience. We confirm that the central bank’s asset purchase programmes, limiting the declines in government bond prices, can successfully stabilize banks’ liquidity demands. The model can be used to analyze the interbank market impact of macroprudential tools.     

Demographic impacts in central and eastern European countries

All countries undergoing socioeconomic transformation in the central, eastern, and southeastern parts of Europe, regardless of the progress made in systemic transformation, have witnessed significant changes in their population. This paper presents some of these demographic changes and considers the dynamics produced by a drop in reproduction rates and the declining frequency of marriages. The intensity of these changes tended to vary. All of the countries, with the exception of Albania, are characterized by low birth rates approaching nominally the level of death rates. Infant mortality rates in the majority of the countries were relatively high at the beginning of the 1990s compared with their minimum.     

Economic transition and elections in Poland1

Poland's economic and political transition, one of the most successful, has depended very heavily on job creation in new firms to replace the jobs lost in the formerly state‐owned enterprises. This paper uses survey and aggregate data from three Polish elections to suggest that these de novo firms, the individuals they employ, and the residents in the local areas where they exist become an important constituency supporting pro‐reform political parties and constraining the actions of parties less sympathetic to the reforms. The creation of this political constituency helps explain how countries can successfully pursue both economic and political reforms. JEL classification: D72, P26.     

Comments on Longmore's Article

In his recent paper [3], Dean R. Longmore develops a new concept of the Payback Period project evaluation criterion, the so-called Time-Adjusted Payback Period, which is supposed to be NPV-compatible and is, therefore, expected by the author to address the needs of practitioners. In this paper, it is indicated that the formulation of the proposed criterion is mathematically incomplete, and its complete version is presented. It is also shown, using numerical examples, that the criterion devised in [3] does not reflect the true content of its name and constitutes, instead, an artificial profitability index. Although this index, in its complete version, is indeed NPV-compatible, it does not, however, offer any advantages over the NPV.     

Institutional investors and stock returns volatility: Empirical evidence from a natural experiment

In this paper, we provide empirical evidence on the impact of institutional investors on stock market returns dynamics. The Polish pension system reform in 1999 and the associated increase in institutional ownership due to the investment activities of pension funds are used as a unique institutional characteristic. Performing a Markov-switching-GARCH analysis we find empirical evidence that the increase of institutional ownership has temporarily changed the volatility structure of aggregate stock returns. The results are interpretable in favor of a stabilizing effect on index stock returns induced by institutional investors.     

Risk Diversification on the Polish Capital Market

The basics of portfolio management theory and methods of efficient selection of assets and their financing have been created by Markowitz and Sharpe. They propose that risk diversification consists, generally speaking, of the increase in the number of securities in a portfolio. So, authors try to answer the question of how many securities have to be bought on a given market to assure a well-diversified portfolio, where the increase in the number of securities does not lead to a significant decrease in portfolio risk. To evaluate such a purpose on the Polish capital market, 20 companies were surveyed that are included in the WIG20 index in the period January 2–October 10, 2001. The returns were estimated on a weekly basis. The research shows that a portfolio of securities constructed, according to the Sharpe Model, has a wide application to the Polish capital market.*University of Szczecin—Poland. This paper was presented at the Fifty-Eighth InternationalAtlantic Economic Conference, October 6Y9, 2005, Chicago, U.S.A.     

An evolutionary model of energy transitions with interactive innovation-selection dynamics

We develop a stylized application of a new evolutionary model to study an energy transition in electricity production. The framework describes a population of boundedly rational electricity producers who decide each period on the allocation of profits among different energy technologies. They tend to invest in below-average cost energy technologies, while also devoting a small fraction of profits to alternative technological options and research on recombinant innovation. Energy technologies are characterized by costs falling with cumulative investments. Without the latter, new technologies have no chance to become cost competitive. We study the conditions under which a new energy technology emerges and technologies coexist. In addition, we determine which investment heuristics are optimal in the sense of minimizing the total cost of electricity production. This is motivated by the idea that, while diversity contributes to system adaptability (innovation) and resilience to unforeseen contingencies (keeping options open), a high cost will discourage investments in it.     

Dividend-Driven Trading Strategies: Evidence from the Warsaw Stock Exchange

This study presents an analysis of dividend-driven trading strategies based on dividend yield growth effects in the Polish stock market in the years 1994–2004. Results indicate that the dividend yield growth portfolios were capable of beating the market in the entire sample period. Their performance, however, was not consistent over time and the highest returns were obtained during final years. Empirical findings based on the analysis of different types of portfolios demonstrate the importance of dividends as a source of significant fundamental information items from stock market companies. At the same time, they show that a dividend investment strategy for the Polish stock market is most successful when the selection of stocks for the dividend yield growth portfolios is subject to further restrictions, most notably concerning company size.

Returns from income strategies in rural Poland

In order to stabilize and improve their income situation, rural households are strongly encouraged to diversify their activities both in and outside the agricultural sector. Often, however, this phenomenon takes on only moderate proportions. This article addresses issues of rural households' income diversification in the case of Poland. It investigates returns from rural households' income strategies using propensity score matching methods and extensive datasets spanning 1998–2008. Results suggest that returns from combining farm and off‐farm activities were lower than returns from concentrating on farming or on self‐employment outside agriculture. This differential is stable over time although returns from diversification have relatively improved after the accession of Poland to the European Union. This is also visible in the fact that since 2006, returns from combining farm and off‐farm activities have equalized with returns from relying solely on hired off‐farm labour, thus smoothing away the difference observed before the accession. Further, over the analysed period, households pursuing a diversification strategy performed better than those relying solely on unearned income. Finally, in general, incomes in households combining farm and off‐farm activities were higher than in those combining off‐farm income sources.