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EN
The article presents the methodology of multi-criteria analysis of unemployment interest rates in selected world economies, and an attempt to forecast the unemployment rate in the USA for three future periods. The research began with an analysis of the multidimensional volatility of unemployment interest rates in selected world economies on a six-month basis in 2011-2018. It was then assessed. The next stage of the study was the analysis and evaluation of the time series of data on the US unemployment interest rates in dynamic terms. Then, the ARIMA forecast model was built and forecasting for three future periods was performed.
PL
W artykule przedstawiono metodykę wielokryterialnej analizy stóp procentowych bezrobocia w wybranych gospodarkach światowych oraz próby przeprowadzenia prognozowania stopy bezrobocia w USA na trzy przyszłe okresy. Badania rozpoczęto od analizy wielowymiarowej zmienności stóp procentowych bezrobocia w wybranych gospodarkach światowych w ujęciu sześciomiesięcznym w latach 2011-2018. Następnie przeprowadzono jej ocenę. Dalszym etapem badania była analiza i ocena szeregu czasowego danych dotyczących stóp procentowych bezrobocia w USA w ujęciu dynamicznym. Następnie zbudowano model prognostyczny ARIMA i wykonano prognozowanie na trzy przyszłe okresy.
EN
The research on the relations between economic stress and the value of secondary sex ratio (SSR) was initiated by Trivers and Willard (1973). The seminal study in this field speculated that smaller (than needed) consumption of goods and services might sufficiently stress human populations and make the secondary sex ratio lower. In order to verify the hypothesis that the observed time-series of secondary sex ratio (SSR) in Poland is declining with the deterioration in „economic conditions”, the ARIMA mathematic model of both analysed phenomena (according to the statistical procedure proposed by Catalano and Bruckner (2005)) was constructed. The analysis is an attempt to answer the question: if the statistically important decline of SSR in Poland after the Second World War was an effect of deterioration of economic condition.
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