This paper provides a theoretical fractional cointegration analysis in a nonparametric framework. We solve a generalized eigenvalues problem, extending Bierens’ (1997) approach. To this end, a couple of random matrices is constructed, distinguishing between stationary and nonstationary part of the fractional integrated process. The asymptotic behavior of such matrices is studied and convergence...

in this study, we assess the impact of oil price changes on the macroeconomic variables of some oil importers in oecd countries, including usa, italian, france and japan during the period 1960-2002. the results for different countries imply asymmetric impact of oil price changes on gdp growth rates; moreover, the results show that monetary shocks are an important and noticeable factor explainin...

Panen merupakan subsistem produksi di perkebunan kelapa sawit yang menjadi perhatian dalam pengelolaan tanaman menghasilkan (TM) dikarenakan faktor utama penyebab kehilangan minyak sawit. Penelitian ini bertujuan untuk mengetahui persentase tingkat kematangan Tandan Buah Segar (TBS) dipanen berat losses berondolan pada topografi berbeda yaitu datar dan berbukit, serta kerugian ditimbulkannya. d...

In recent decades, there has been a growing literature dealing with the empirical estimation of rate profit and other Marxian variables in several countries. Nonetheless, paucity econometric research about impact those on growth developing This article seeks to evaluate accumulation as determinants Colombia during 1967–2019, using generalized vector autoregressive model. We find that both are s...

This paper aims to develop a hybrid model for forecasting electrical energy consumption of households based on Particle Swarm Optimization (PSO) algorithm associated with the Grey and Adaptive Neuro-Fuzzy Inference System (ANFIS). proposes new Grey-ANFIS-PSO that is historical data from smart meters in order estimate improve accuracy consumption. will be characterized by coefficients such as Ro...

OBJECTIVE Our basic understanding of ascending thoracic aortic aneurysm (ATAA) pathogenesis is still very limited, hampering early diagnosis, risk prediction, and development of treatment options. "Omics"-technologies, ideal to reveal tissue alterations from the normal physiological state due to disease have hardly been applied in the field. Using a metabolomic approach, with this study the aut...

Acid methanolysates of 104 strains of coryneform and related bacteria were examined for mycolic acids by thin-layer chromatography and mass spectrometry. The mycolic acids of Corynebacterium sensu stricto strains were not uniform in size and structure, and considerable variation existed within the approximate limiting range of C22 to C36. Two species, Corynebacterium bovis and 'Corynebacterium ...

The present study aims to examine the short-run and long-run impact of China’s trade liberalization policies on its energy demand over period from 1980 2018. results Autoregressive Distributed Lag approach co-integration show that consumption significantly increases as a result openness increase in real Gross Domestic Product (GDP). granger causality test also confirm unidirectional running GDP...