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    Wyświetlanie 1-4 z 4
    Tytuł:
    Interpretation of Structural Parameters for Models with Spatial Autoregression
    Autorzy:
    Pietrzak, Michał Bernard
    Powiązania:
    https://bibliotekanauki.pl/articles/517218.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    spatial econometrics
    measures of average impact
    Opis:
    The main purpose of the article is to consider a important issue of spatial econometrics, which is a proper interpretation of structural parameters of econo-metric models with spatial autoregression. The problem will be considered basing on the example of the spatial SAR model. Another purpose of the article is to make an overview of measures of average spatial impact proposed by the subject litera-ture (see Lesage and Pace 2009). The analysis will include such measures as Aver-age Total Impact to an Observation, Average Total Impact from an Observation, Average Indirect Impact to an Observation, Average Indirect Impact from an Ob-servation and Average Direct Impact. Having considered the above issues, I will introduce a set of three original measures that allow the interpretation of the strength of the impact of the explanatory processes within the spatial SAR model, which take the forms of average direct impact, average indirect impact and average induced impact. The use of this set of measures will be illustrated with the example of the analysis of the unemployment rate in Poland. It must be emphasized that the presented set of measures may also be designated for other spatial models. With the knowledge of the empirical form of the model and of the spatial weight matrix, the set of measures introduced simplifies significantly the complex procedure of the interpretation of the structural parameters for spatial models to the use of merely three values.
    Źródło:
    Equilibrium. Quarterly Journal of Economics and Economic Policy; 2013, 8, 2; 129-155
    1689-765X
    2353-3293
    Pojawia się w:
    Equilibrium. Quarterly Journal of Economics and Economic Policy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Modifiable Areal Unit Problem – Analysis of Correlation and Regression
    Autorzy:
    Pietrzak, Michał Bernard
    Powiązania:
    https://bibliotekanauki.pl/articles/517297.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    spatial econometrics
    modifiable areal unit problem
    scale problem
    Opis:
    The paper focuses on the issue of the modifiable areal unit problem, which means a possibility of obtaining various results for spatial economic analyses depending on the assumed composition of territorial units. The major research objective of the work is to examine the scale problem that constitutes one of the aspects of the modifiable areal unit problem. Analysis of the scale problem will be conducted for two research problems, namely, for the problem of the causal relationships between the level of investment outlays in enterprises per capita and the number of entities of the national economy per capita, and the issue of the dependence between the registered unemployment rate and the level of investment outlays per capita. The calculations based on the empirical values of those variables have showed that moving to a higher level of aggregation resulted in a change in the estimates of the parameters. The results obtained were the justification for undertaking the realisation of the objective. The scale problem was considered by means of a simulation analysis with a special emphasis laid on differentiating the variables expressed in absolute quantities and ones expressed in relative quantities. The study conducted allowed the identification of changes in basic properties as well as in correlation of the researched variables expressed in absolute and relative quantities. Based on the findings, it was stated that a correlation analysis and a regression analysis may lead to different conclusions depending on the assumed level of aggregation. The realisation of the research objective set in the paper also showed the need to consider the adequate character of variables in both spatial economic analyses and during the examination of the scale problem.
    Źródło:
    Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 4; 113-131
    1689-765X
    2353-3293
    Pojawia się w:
    Equilibrium. Quarterly Journal of Economics and Economic Policy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Redefining the Modifiable Areal Unit Problem Within Spatial Econometrics, the Case of the Aggregation Problem
    Autorzy:
    Pietrzak, Michał Bernard
    Powiązania:
    https://bibliotekanauki.pl/articles/517415.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badań Gospodarczych
    Tematy:
    spatial econometrics
    modifiable areal unit problem
    scale problem
    aggregation problem
    Opis:
    The paper focuses on the issue of the aggregation problem, which is frequently discussed within spatial econometrics. The aggregation problem is one of the two aspects of the modifiable areal unit problem (MAUP). The aggregation problem is connected with the volatility of the obtained results occurred when various compositions of territorial units for the same aggregation scale were applied. The objective of the present paper is to consider the redefinition of aggregation problem and showing positive solution of the aggregation problem based on the empirical example of determining agricultural macroregions. In the article the aggregation problem was defined as a problem of establishing a particular composition of territorial units at a selected aggregation scale in a such a way that is remains in the quasi composition of regions within the undertaken research problem. The paper also presented the procedure for determining agricultural macroregions where the analysis of the spatial volatility of the agrarian structure and the current knowledge on the agriculture in Poland were applied. In addition, the paper considered the final areal interpretation problem con-nected with the incorrect determination of the area in relation to which final conclusions are drawn. The problem was presented basing on the example of the establishment of the average concentration of the area of agricultural land in Poland with the use of the Gini index calculated for districts. The paper emphasised that ignoring the final areal interpretation problem in spatial analyses may lead to an apparent identification of the modifiable areal unit problem.
    Źródło:
    Equilibrium. Quarterly Journal of Economics and Economic Policy; 2014, 9, 3; 131-151
    1689-765X
    2353-3293
    Pojawia się w:
    Equilibrium. Quarterly Journal of Economics and Economic Policy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie przestrzennego taksonomicznego miernika rozwoju (pTMR) w analizie rynku pracy w Polsce
    The application of spatial taxonomic measure of development (sTMD) in analysis of the labour market in Poland
    Autorzy:
    Pietrzak, Michał Bernard
    Powiązania:
    https://bibliotekanauki.pl/articles/588561.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    Ekonometria przestrzenna
    Taksonometria
    Taksonomiczny miernik rozwoju
    Zależności przestrzenne
    Spatial dependence
    Spatial econometrics
    Synthetic index
    Taxonomic measure of development
    Opis:
    Tematyka artykułu dotyczy zastosowania przestrzennego taksonomicznego miernika rozwoju (pTMR) w analizie rynku pracy w Polsce. Zastosowanie tego miernika wiąże się z faktem, że większość zjawisk ekonomicznych charakteryzuje się dodatnimi zależnościami przestrzennymi. Wymusza to uwzględnienie tych zależności w przestrzennych analizach ekonomicznych. W przypadku przestrzennego taksonomicznego miernika rozwoju zależności przestrzenne są uwzględniane w konstrukcji miernika poprzez wykorzystanie potencjalnej siły interakcji między regionami. Pozwala to na określenie za pomocą miernika tendencji w kształtowaniu się analizowanych zjawisk. W artykule przeprowadzono analizę sytuacji na rynku pracy dla 66 podregionów w Polsce (NUTS 3). Przeprowadzone badanie dało możliwość oceny sytuacji na rynku pracy oraz określenia tendencji w jego rozwoju.
    The content of the article refer to application of spatial taxonomic measure of development (sTMD) while analysing the labour market in Poland. The need for the use of a spatial taxonomic measure of development is related to the fact that most economic phenomena are characterized by positive spatial dependence. This necessitates the inclusion of this dependence in spatial economic analyses. The article analyses the labour market in 66 subregions (NUTS 3) in 2012. The study allowed us to assess the situation on the labour market and identify the trends in its development.
    Źródło:
    Studia Ekonomiczne; 2016, 291; 47-58
    2083-8611
    Pojawia się w:
    Studia Ekonomiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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