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The article presents of touristic traffic recorded in night’s lodging situated on the subregions in Poland in 2008. In analysis were used coefficients of touristic traffic development, which allowed for qualification the role of studied subregion in development of touristic sector in Poland. In the analysis also was made investigations of spatial differentiation of touristic attractiveness and was...
The article attempts to select variables which influence the decision to go on holiday in pensioners’ households. The information on tourist activities of pensioners’ households has been taken from the survey entitled Tourism and Recreation in Households, conducted by the Central Statistical Office (GUS) in 2005. A log-linear analysis was used for the purpose of selecting the optimal set of factors...
This paper presents bootstrap algorithm, that helps increase the accuracy of the forecasts creates with additive Holt-Winters model for seasonal times series. In the process of forecasting was used the overlapping blocks bootstrap method (Kunsh method) with various blocks lengths. In calculates was used "forecast" and "tseries" modules from statistical program R.
In the article author considers the situation in which several forecasts of the same variable are available. The main problem is to select the best forecast. It enables us to create new forecast – the combined forecast with the smallest variance of prediction error. The author analyses two econometric methods of creating combined forecasts as a weighted average and their properties. The author makes...
The work demonstrates that the parameter estimation of a regular two-stage hierarchical model of a time series for the seasonal data deprived of a linear trend are the same as the estimations obtained on the basis of a two-factor hierarchical model of a variance analysis, in which each of the factors of a higher order has corresponding lower-order factors of the same value. Theoretical considerations...
In the article the Author formulated the diagnosis of the financial-economic condition of companies listed on Warsaw Stock Exchange. As the research tool the simple correspondence analysis with doubling was used. This method was discribed in detail in the methodological part of the article. The weaknesses and strengths of these firms were underlined. The diagnosis was assigned on the base of profitability,...
The farms of Zachodniopomorskie Province possess a large surplus of manpower. The dynamic optimization models with random restrictions served the investigation of the possibilities of implementation of the unused man-hours. Those models regarded four consecutive years: 2003–2006. The solution proceeded in two steps. The first step allowed to determine the surplus or the deficiency of production factors...
The aim of the article is spatial analysis of urban-rural gminas in zachodniopomorskie voivodship under the account of the socio-economic development level in year 2008 and indication of the disproportion in the area of research phenomenon. In the article there were used two selected methods of classification: Warda and k-means. There were eight groups of typological gminas on the basis of dendogram...
In this work, for example, medium-sized cities (from 50 to 150 thousand population) has been made an attempt to analyze the spatial variation of the selected indicators of standard of living in a dynamic in the years 2002–2008. For the study were selected 36 cities. In the first stage, a set of 13 diagnostic features of the final set of 7 variables were selected variables.
The article describes the economic entities’ level of involvement in the information- -telecommunication technologies. It also presents the ranking of Polish voivodeships in terms of usage of the above-mentioned technologies in enterprises, in the year 2009. The research has been conducted with help of multi-criteria arrangement of the UTA decisional variants, based on disaggregation of preferential...
Article presents application of classical genetic algorithm for the problem of dynamic optimization of the linear model. The model describes plants production during two years and takes into consideration plants changing. The soil in a good culture it is very important issue to obtain the highest crop. In the work the conditions for classical genetic algorithm to solving introduced problem are presented.
The study, based on Central Statistical Office of Poland (GUS) data for the period 1998–2005, analyzed the relationship between variability of fertilization and crop variability: cereals, potatoes, sugar beet, oilseed rape, hay, number of tractors per 100 hectares of agricultural land, the value of crop production by years and provinces. The macro-scale analysis with difficulty shows the influence...
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