Þrátt fyrir fjölda svefnrannsókna á undanförnum árum er enn margt huldu um útbreiðslu svefnvenja meðal ungmenna. Nægur nætursvefn mikilvægur þroska, heilsu og námsgetu ungs fólks. Markmið rannsóknarinnar var að skoða hvort svefnlengd íslenskra skólanema samræmdist svefnráðleggingum, hver meðalsvefnlengd nemendanna væri munur tíðni ráðlagðs svefns milli einstakra hópa nemenda.Landskönnunin „Heil...

JEL classification: E32 C32 How similar is the price behavior of oil, natural gas, and coal? Are there any interactions among these three fuel prices and their volatilities? Using the Yatchew and Dimitropoulos (2016) annual data for the United States, over the period from 1870 to 2014, and state-of-the-art econometric methodology, we explore for spillovers and interactions among the three energ...

China’s introduction of CSI300 futures in 2010 has aroused widespread attention to whether the stock index futures market has effectively stabilized price fluctuations of its spot market in the past four years. Since the prices of CSI300 futures and CSI300 contain numerous noises and fluctuate drastically over time, this paper applies discrete wavelet transform to denoise these series by decomp...

The Multidimensional Scale of Irrational Beliefs (MSIB) is a brief and theoretically founded measure of irrational thinking as conceptualized by Albert Ellis in his most recent works on Rational Emotive Behavior Therapy (e.g., Ellis, 2003). With a total of 18 items, it captures demandingness, negative self-evaluation, and low frustration tolerance as the three core aspects of irrationality. Unl...

Bu çalışmanın amacı, dünya petrol, kömür ve doğal gaz fiyatlarındaki değişikliklerin düzeltilmemiş piyasa faiz oranına göre düzeltilmiş BIST elektrik endeksinin getirisine etkisinin 17 Mayıs 2010 – 29 2020 dönemi için araştırılmasıdır. Değişkenler arasındaki nedensellik ilişkisi Granger Nedensellik testi ile, oynaklık yayılımı ise GARCH (1,1) ADC BEKK yöntemleri ile incelenmiştir. Analiz bulgul...