Unveiling Participant Level Determinants of Unit Non-Response in Business Tendency Surveys

Business Tendency Surveys (BTS) continue to be an important source of timely information on business cycles in many countries. We address quality of economic survey data by uncovering the relation between unit non-response and participant characteristics on company respectively respondent level. We use a unique, matched dataset that merges rich business tendency survey panel data with data from an exclusively conducted meta survey. Our meta information enhances the set of firm characteristics by information such as valuation of business tendency surveys or perceived response burden. We use different count data models to explain non-response count. Our models include weighted count data regressions as well as a two part hurdle model. We find that response burden, a company's survey track record, timeliness and participation mode are the strongest and most robust predictors of unit non-response. We also find a weaker negative effect of the business situation on unit response. Remarkably we do not find a significant influence of neither company size nor valuation of BTS on the propensity to respond to periodical qualitative BTS

The Swiss Mass Immigration Initiative: The Impact of Increased Policy Uncertainty on Expected Firm Behaviour

In Switzerland a sudden policy uncertainty shock happened in February 2014 with the close and largely unexpected acceptance of a referendum aiming at limiting free movement of persons. The referendum requires Switzerland to reintroduce annual quotas for immigrants within three years. The referendum is vaguely formulated and its actual consequences are largely unknown. Yet, the vote reduced the expected future availability of qualified labour, put at stake several economically important agreements between Switzerland and the European Union, and reduced expected future domestic demand for firms. This paper uses a special survey conducted by the KOF Swiss Economic Institute to analyse the short- to medium-run expected consequences of this substantial policy uncertainty shock on firms' private fixed investment and employment plans. We find that those firms that believe that potential growth in Switzerland will deteriorate and those that report that investment uncertainty has increased are also the ones that see a significant reduction in their future investment activities and their expected employment due to the vote, so that an uncertainty effect is present. We also provide evidence that the short-term effect of policy uncertainty on investment is economically significant.Die knappe Annahme der Initiative gegen Masseneinwanderung im Februar 2014 führte zu einem unerwarteten Anstieg der Unsicherheit über die zukünftigen politischen Rahmenbedingen in der Schweiz. Die Initiative verpflichtet den Bundesrat zur gesetzlichen Einführung fixer Kontingente innerhalb der nächsten drei Jahre. Die weit gefasste Formulierung des Initiativtextes verhindert jedoch das Vorhersehen der genauen Umsetzung und erhöht damit den Spielraum möglicher Auswirkungen, was letztlich in einem Anstieg der Unsicherheit resultiert. Die geforderten Kontingente beschränken den Zugang Schweizer Firmen zu ausländischen Arbeitskräften und erhöhen die Gefahr eines zukünftigen Mangels an Fachkräften. Zudem sind Kontingente mit dem bestehenden Vertrag der Personenfreizügigkeit unvereinbar, bei dessen Auflösung käme es zur Kündigung aller mit der Personenfreizügigkeit verbunden bilateralen Abkommen. Die Aussicht auf die Kündigung der bilateralen Verträge erhöht die Unsicherheit über den Zugang Schweizer Unternehmen zum Binnenmarkt der Europäischen Union und senkt letztlich die Erwartungen der zukünftigen Gesamtnachfrage. In diesem Artikel untersuchen wir die kurz- bis mittelfristigen Auswirkungen der Annahme der Initiative auf Beschäftigung und Investitionen. Unsere Analysen basieren auf einer Sonderumfrage der KOF Konjunkturforschungsstelle und zeigen, dass die gestiegene Unsicherheit bereits jetzt zu einer Reduktion der Investitionspläne und zukünftigen Beschäftigung führt

Involvement of the limbic system in multiple sclerosis patients with depressive disorders

This study investigates the relationship between depression and both anatomic and cerebral bloodflow abnormalities in multiple sclerosis (MS) patients. Ten nondepressed MS patients were compared with 10 depressed MS patients matched for age, sex, and functional disability. Both groups were evaluated by means of neuropsychological rests, magnetic resonance imaging, and single-photon emission tomography imaging. There was no difference between the two groups with regard to the global cognitive score. Magnetic resonance imaging data showed no significant differences in the number, side, location, and area of the demyelinating lesions between the two groups; however, regional cerebral blood flow asymmetries in the limbic cortex did distinguish the two groups. Analysis of variance showed a significant effect of depression on the perfusion asymmetries in the limbic cortex. Finally, perfusion asymmetries in limbic cortex significantly correlated with depression test scores. Our findings suggest that depression in MS patients could be induced by a disconnection between subcortical and cortical areas involved in the function of the limbic system

Magnetic resonance imaging of the parotid glands and lip biopsy in the evaluation of xerostomia in Sjögren's syndrome.

Magnetic Resonance Imaging (MRI) of the parotid glands was performed in 23 patients with dry mouth. Each patient underwent lip salivary gland (LSG) biopsy and complete clinical and immunological assessment. MRI showed a quite specific nodular pattern in the parotid glands of patients with Sjogren's syndrome (SS), especially those with severe histoloqic abnormalities in LSG. However no significant correlation could be detected between MRI score and both LSG biopsy class and immunological abnormalities. MRI of the parotid glands can be regarded as a useful noninvasive procedure with high positive predictive value for the evaluation of the salivary component in SS

Use of transcranial direct current stimulation for the treatment of auditory hallucinations of schizophrenia – a systematic review

Introduction: Auditory hallucinations are defined as experiences of auditory perceptions in the absence of a provoking external stimulus. They are the most prevalent symptoms of schizophrenia with high capacity for chronicity and refractoriness during the course of disease. The transcranial direct current stimulation (tDCS) – a safe, portable, and inexpensive neuromodulation technique – has emerged as a promising treatment for the management of auditory hallucinations. Objective: The aim of this study is to analyze the level of evidence in the literature available for the use of tDCS as a treatment for auditory hallucinations in schizophrenia. Methods: A systematic review was performed, searching in the main electronic databases including the Cochrane Library and MEDLINE/PubMed. The searches were performed by combining descriptors, applying terms of the Medical Subject Headings (MeSH) of Descriptors of Health Sciences and descriptors contractions. PRISMA protocol was used as a guide and the terms used were the clinical outcomes (“Schizophrenia” OR “Auditory Hallucinations” OR “Auditory Verbal Hallucinations” OR “Psychosis”) searched together (“AND”) with interventions (“transcranial Direct Current Stimulation” OR “tDCS” OR “Brain Polarization”). Results: Six randomized controlled trials that evaluated the effects of tDCS on the severity of auditory hallucinations in schizophrenic patients were selected. Analysis of the clinical results of these studies pointed toward incongruence in the information with regard to the therapeutic use of tDCS with a view to reducing the severity of auditory hallucinations in schizophrenia. Only three studies revealed a therapeutic benefit, manifested by reductions in severity and frequency of auditory verbal hallucinations in schizophrenic patients. Conclusion: Although tDCS has shown promising results in reducing the severity of auditory hallucinations in schizophrenic patients, this technique cannot yet be used as a therapeutic alternative due to lack of studies with large sample sizes that portray the positive effects that have been described