Search results for "SAMPLE"
showing 10 items of 2270 documents
The effect of the great recession on foreign direct investment: global empirical evidence with a gravity approach
2013
This article estimates the effect of the present global systemic banking crisis on foreign direct investment (FDI) using the gravity equation on a sample of 161 countries over the period 2003 to 2010. Systemic banking crises, through demand shocks and credit constraints, may impact FDI in two ways: aggregate monetary flows and individual projects count. Since gravity equations account for output variations, our research relies on the financial constraints channel. We find that the great recession, through credit constraints on home supply markets, has reduced the number of FDI projects, but not their size, forcing investors to become more selective on their international endeavours.
The effect of financial crises on potential output: New empirical evidence from OECD countries
2012
Abstract The aim of this paper is to assess the impact of financial crises on potential output. For this purpose a univariate autoregressive growth equation is estimated on an unbalanced panel of OECD countries over the period 1960–2008. Our results suggest that the occurrence of a financial crisis negatively and permanently affects potential output. In particular, financial crises are estimated to lower potential output by around 1.5–2.4% on average, with most of the impact coming from the effect on capital. The magnitude of the effect increases with the severity of the crisis. These results are robust to the use of an alternative measure of potential output, changes in the methodology and…
The effects of budget deficit on national saving in the OECD
2000
Abstract In this paper, we estimate a structural VAR using a panel of OECD countries, which includes national saving and budget deficit, both as the ratio to GDP, to test the Ricardian Equivalence hypothesis. In this framework, we separate saving and deficit movements into two types of shocks, associated with structural parameters of these economies. Our results suggest that Ricardian Equivalence did not work in our sample of OECD countries, since private saving compensated only a small fraction budget deficit. This supports the interpretation that the large budget deficits have been a very important factor behind the significant increase in real interest rates in the eighties and early nin…
Low-Cost Solution for Magnetic Field Mapping Device
2018
Distribution of magnetic field around different magnetic objects is important for various applications of magnetic materials. Field distribution can be measured with a 3-axis Hall probe sensor, which is moved around the sample. There are excellent systems available in market for this purpose for example, magnetic field mapper MMS-1A-RS from SENIS AG. However, these systems are quite expensive, starting from 25000=C. Here we demonstrate how a simple automated magnetic field mapper can be made from common parts found in laboratories, test it to verify accuracy, compare results with numerical simulations and discuss the benefits of this low-cost alternative.
Foodomics assessed by Fourier transform mass spectrometry
2019
Abstract With its ultrahigh resolution power and excellent mass accuracy, Fourier transform ion cyclotron resonance mass spectrometry is the perfct tool to analyze the “foodome” as the set of all polar small molecular compounds present in an investigated food sample. We present here selected applications of this technique in unraveling the metabolome in complex foods (thermally affected, fermentation products, distillates) such exemplified with Maillard reaction products or with wines and spirits. Technical considerations for high resolution mass analyzers are provided from a practical point of view. Moreover, aspects of food safety and nutritional quality are covered by presenting applicat…
Overrating Classifier Performance in ROC Analysis in the Absence of a Test Set: Evidence from Simulation and Italian CARATkids Validation
2019
Background The use of receiver operating characteristic curves, or “ROC analysis,” has become quite common in biomedical research to support decisions. However, sensitivity, specificity, and misclassification rates are still often estimated using the training sample, overlooking the risk of overrating the test performance. Methods A simulation study was performed to highlight the inferential implications of splitting (or not) the dataset into training and test set. The normality assumption was made for the classifier given the disease status, and the Youden's criterion considered for the detection of the optimal cutoff. Then, an ROC analysis with sample split was applied to assess the disc…
Validation of the German Version of the Power of Food Scale in a General Population Sample
2019
<b><i>Objective:</i></b> The Power of Food Scale (PFS) is a self-report instrument for assessing appetitive motivation in the absence of caloric needs. The study aim was to validate the German PFS version in a large population sample. <b><i>Methods:</i></b> Complete information on all PFS items was available from 2,421 respondents (age ≥14) of a nationally representative sample of the German population. We examined the psychometric properties of the German PFS version and provided population-based normative data. <b><i>Results:</i></b> The 3-factor structure of the original scale was replicated in confirmatory factor an…
Shared genetic etiology between alcohol dependence and major depressive disorder
2018
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Sample size planning of two-arm superiority and noninferiority survival studies with discrete follow-up
2016
In clinical trials using lifetime as primary outcome variable, it is more the rule than the exception that even for patients who are failing in the course of the study, survival time does not become known exactly since follow-up takes place according to a restricted schedule with fixed, possibly long intervals between successive visits. In practice, the discreteness of the data obtained under such circumstances is plainly ignored both in data analysis and in sample size planning of survival time studies. As a framework for analyzing the impact of making no difference between continuous and discrete recording of failure times, we use a scenario in which the partially observed times are assig…
Intestinal symptoms and Blastocystis load in schoolchildren of Paranaguá Bay, Paraná, Brazil
2017
ABSTRACT The symptomatology of Blastocystis cannot be attributed to any particular subtype, although can be related to a high Blastocystis infection load. One stool sample from each of 217 schoolchildren of Vale de Sol Paranaguá Bay (Paraná, Brazil) was collected. Three milliliters of each fixed stool sample were processed applying the formalin-ether concentration technique. After obtaining the overall prevalence of intestinal parasites, quantification was carried out in Blastocystis positive samples. A total of 75/217 (34.6%) children suffered from intestinal symptoms (abdominal pain and/or persistent diarrhea), of whom 41.3% (31/75) presented moderate/heavy Blastocystis load with a statis…