Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: model autoregresji wektorowej

Sortuj według:

Ogranicz wyniki do:

Forecasting municipal waste accumulation rate and personal consumption expenditures using vector autoregressive (VAR) model

Bień Jurand

Production Engineering Archives

2022

Vol. 28, Iss. 2

150--156

Accurate forecasting of municipal solid waste (MSW) generation is important for the planning, operation and optimization of municipal waste management system. However, it’s not easy task due to dynamic changes in waste volume, its composition or unpredictable factors. Initially, mainly conventional and descriptive statistical models of waste generation forecasting with demographic and socioeconomic factors were used. Methods based on machine learning or artificial intelligence have been widely used in municipal waste projection for several years. This study investigates the trend of municipal waste accumulation rate and its relation to personal consumption expenditures based on the yearly data achieved from Local Data Bank (LDB) driven by Polish Statistical Office. The effect of personal consumption expenditures on the municipal waste accumulation rate was analysed by using the vector autoregressive model (VAR). The results showed that such method can be successfully used for this purpose with an approximate level of 2.3% Root Mean Square Error (RMSE).

Oddziaływanie inflacji na wzrost gospodarczy w Polsce w okresie 1991-2009

Misztal P.

Ekonomia i Zarządzanie

2010

Vol. 2, no. 3

46-57

The main aim of the study was to analyze the impact of inflation on the economic growth in Poland in the period from 1991 to 2009. In the paper, methods based on the literature study of international economics and international finance as well as econometric methods (Vector Autoregression Model - VAR) were used. All statistics used in the paper came from the statistical base EconStats. On the basis of the analysis of the relationship between inflation and the economic growth in Poland in the period from 1991 to 2009 you can point to several key conclusions. Firstly, relationship between the inflation rate and the dynamics of real GDP in Poland was relatively important in this period. Moreover, on the basis of VAR model estimates, a negative influence of inflation on the economic growth in Poland over considered period was confirmed. The results also revealed that changes in the inflation rate accounted for 0.5% variability of the growth rate of real GDP in Poland after a year from the shock. Moreover, the existence of non-linear relationship between inflation and economic growth in Poland was confirmed and two threshold levels of inflation amounted to 2.49% and 11.8% were estimated.