Petr Janský
Charles University in Prague
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Publication
Featured researches published by Petr Janský.
European Journal of Preventive Cardiology | 2014
Jan Bruthans; Renata Cifkova; Věra Lánská; Martin O'Flaherty; Julia Critchley; Jiří Holub; Petr Janský; Jana Zvárová; Simon Capewell
Background Coronary heart disease (CHD) mortality has declined substantially in the Czech Republic over the last two decades. Design The purpose of this study was to determine what proportion of this CHD mortality decline could be associated with temporal trends in major CHD risk factors and what proportion with advances in medical and surgical treatments. Methods The validated IMPACT mortality model was used to combine and analyse data on uptake and effectiveness of CHD management and risk factor trends in the Czech Republic in adults aged 25–74 years between 1985 and 2007. The main sources were official statistics, national quality of care registries, published trials and meta-analyses, and the Czech MONICA and Czech post-MONICA studies. Results Between 1985 and 2007, age-adjusted CHD mortality rates in the Czech Republic decreased by 66.2% in men and 65.4% in women in the age group 25–74 years, representing 12,080 fewer CHD deaths in 2007. Changes in CHD risk factors explained approximately 52% of the total mortality decrease, and improvements in medical treatments approximately 43%. Increases in body mass index and in diabetes prevalence had a negative impact, increasing CHD mortality by approximately 1% and 5%, respectively. Conclusions More than half of the very substantial fall in CHD mortality in the Czech Republic between 1985 and 2007 was attributable to reduction in major cardiovascular risk factors. Improvement in treatments accounted for approximately 43% of the total mortality decrease. These findings emphasize the value of primary prevention and evidence-based medical treatment.
Economic Geography | 2015
Alex Cobham; Petr Janský; Markus Meinzer
Both academic research and public policy debate around tax havens and offshore finance typically suffer from a lack of definitional consistency. Unsurprisingly then, there is little agreement about which jurisdictions ought to be considered as tax havens—or which policy measures would result in their not being so considered. In this article we explore and make operational an alternative concept, that of a secrecy jurisdiction and present the findings of the resulting Financial Secrecy Index (FSI). The FSI ranks countries and jurisdictions according to their contribution to opacity in global financial flows, revealing a quite different geography of financial secrecy from the image of small island tax havens that may still dominate popular perceptions and some of the literature on offshore finance. Some major (secrecy-supplying) economies now come into focus. Instead of a binary division between tax havens and others, the results show a secrecy spectrum, on which all jurisdictions can be situated, and that adjustment for the scale of business is necessary in order to compare impact propensity. This approach has the potential to support more precise and granular research findings and policy recommendations.
Post-communist Economies | 2015
Petr Janský; Ondřej Kokeš
This article contributes to the growing systematic evidence of corporate tax base erosion and profit shifting out of most countries into other countries, including tax havens, by analysing the situation in one of the post-communist economies. We analyse financial and ownership data of 13,603 companies operating in the Czech Republic, including multinational corporations (4124), some of which have links to tax havens (528). We present empirical evidence suggesting that the effect of the multinational corporations’ links with tax havens on the debt ratio of companies in the Czech Republic is positive. The evidence on profits and taxes is not so conclusive. We provide policy implications and conclude with questions for further research.
Development Policy Review | 2018
Alex Cobham; Petr Janský
multinational tax avoidance; corporate tax reform; formula apportionment; unitary taxation; base erosion; profit shifting; BEPS.
Eastern European Economics | 2016
Petr Janský; Klara Kaliskova; Daniel Münich
The Czech Republic is home to one of the more equal societies in terms of household disposable income, and has the lowest level of relative poverty in Europe. This study shows that Czech market income is quite egalitarian, especially when pensions are included. It finds that the narrowly defined tax-benefit system (i.e., direct taxes and social benefits) does not actually change the poverty rate, and that indirect taxes increase it. It further provides the first estimates of the redistributive effectiveness and targeting of a number of social and tax policies.
Post-communist Economies | 2018
Petr Janský
Abstract International corporate tax avoidance by multinational enterprises likely lowers the Czech Republic’s corporate income tax revenue, but it is not clear by how much. To clarify this I first review existing estimates of the revenue losses of international corporate tax avoidance to government revenue worldwide. I then discuss revenue estimates relevant for the Czech Republic and develop a few new, albeit only illustrative, ones. None of the existing research focused on the Czech Republic nor did the six recent international studies I examine provide reliable estimates for the Czech Republic. The extrapolations from these studies result in a revenue loss of a quite wide range with a median of 10% of current corporate income tax revenues. The other newly prepared estimates, based on firm-level and aggregate data, are of similar magnitude. I conclude with a discussion of these rough estimates as well as questions for further research and policy recommendations.
Applied Economics Letters | 2016
Petr Janský; Ondřej Kokeš
ABSTRACT Although tax havens have been affecting other countries for decades, only in recent years have the associated challenges been subject to intensive scrutiny in both research and policy areas. We contribute to the growing evidence of corporate tax base erosion and profit-shifting by testing multinational companies’ ownership links to individual tax havens rather than to groups of them, as is the case with most previous research. Our company-level analysis suggests that profit shifts through debt financing from the Czech Republic to Luxembourg, Switzerland and, to a lesser extent, the Netherlands. We have ascertained that tax havens are not limited to tiny islands and may actually be found among European countries. We also provide rough estimates of the impact of this profit-shifting on tax revenues as well as a policy recommendation.
Prague Economic Papers | 2016
Tatiana Chudá; Petr Janský
Health-motivated taxes have spread over the world to reduce increasing obesity and corresponding health care costs. These taxes have not yet been implemented in the Czech Republic, in contrast to some other, mainly European countries. However, the introduction of a fat tax has been discussed frequently in the Czech Republic during the last few years; here, we provide empirical evidence in order for this public debate to be better informed. We use detailed microeconomic data to estimate the impact of potential fat taxes on household expenditure and government revenues in the Czech Republic. We evaluate the impact of three types of fat taxes: ad valorem, specific per kilogram of product and specific per kilogram of fat. We simulate these in such a way that they all raise the same budget revenues as a 10% ad valorem tax on fat-rich products. Accounting for higher food expenditures in the aggregate national accounts than in the detailed microeconomic data results into higher budget revenues, 7.3 and 6.1 billion Czech korunas, respectively. Overall we find, and thus confirm the overwhelming evidence from other countries, that fat taxes are regressive in income.
European Planning Studies | 2016
Petr Janský; Tomáš Křehlík; Jiří Skuhrovec
ABSTRACT European Union (EU) funds flowing into budgets of public sector organizations of its member states should be additional to their nationally funded expenditures. To investigate this additionality principle systematically, we develop a new empirical method. Our main hypothesis is that some of the EU-funded projects are crowding out national public expenditures. Not being able to reject the hypothesis would be consistent with violating the additionality principle. To test the hypothesis, we examine how EU funding translates into actual spending of relatively comparable municipalities of the Czech Republic. We innovatively match the municipal authorities’ budgetary data on EU-funded expenditure projects with their other, nationally funded, expenditures. We find no systemic crowding out of national public expenditures by EU funds at the level of operational programmes in the Czech municipalities’ data, which is consistent with no evidence of violating the additionality principle. Nonetheless, going down to the municipal level enables us to show how the results can pinpoint individual cases of EU fund’s potential mismanagement in Czech municipalities. Overall, we provide the first evaluation of the additionality principle at the level of individual recipients of EU funds and in doing so we develop a methodological approach potentially applicable to other fund recipients.
American Journal of Therapeutics | 2016
Ales Tomek; Václav Matʼoška; Alena Frýdmanová; Hana Magerova; Martin Šrámek; Jaroslava Paulasova-Schwabová; Tereza Růžičková; Petr Janský; Ivana Šarbochová; Ivana Hadačová; Vojtěch Kaplan; Zuzana Lacinová; Luděk Táborský; Victor L. Serebruany
Background: Variable response after clopidogrel is well documented and may affect major adverse clinical events after stroke. Impact of CYP2C19 genetic polymorphisms is an established marker linked to variable response after clopidogrel. However, the association of certain genetic polymorphisms with prediction of major adverse clinical events following stroke still remains controversial, especially in Caucasians. Study Question: The primary aim was to evaluate the impact of CYP2C19 allele *2 in heterozygote form on major adverse clinical events in Caucasian poststroke survivors treated with clopidogrel. The secondary aim was to analyze the potential link between CYP2C19 genetic polymorphism and variable response after clopidogrel. Study Design: One hundred thirty patients of Caucasian origin following documented ischemic stroke were included. Platelet reactivity was assessed by light transmittance aggregometry (LTA) and matched with various CYP2C19 loss-of-function genetic polymorphisms and major adverse clinical events (composite of vascular deaths, stroke/transient ischemic attack, and myocardial infarction). Results: Over the mean follow-up of 14.9 months, 19 patients experienced major adverse clinical events. The risk of major adverse clinical events was nearly 3-fold in loss-of-function allele carriers (hazard ratio = 2.904; 95% confidence interval, 1.083–7.786; P = 0.013), whereas the risk of ischemic stroke or transient ischemic attack alone was also higher (hazard ratio = 3.170; 95% confidence interval, 1.281–7.849; P = 0.034). Platelet activity was strongly associated with allele *2 status (rs = 0.21, P = 0.016) but not with other genetic polymorphisms. Carriers of allele*2 exhibited lower platelet response to adenosine diphosphate—mean LTA (30.1% vs. 42.0%; P = 0.017). There were no significant differences in LTA results with other agonists. Strong association of increase in adenosine diphosphate–induced aggregation with diabetes mellitus (rs = 0.20, P = 0.023), increasing age (rs = 0.23, P = 0.008), and conversely diminishing over increased weight (rs = 0.23, P = 0.009) was also detected. The carriers of other gene allele variants lack uniformed impact on variable response after clopidogrel. Conclusions: Even heterozygous CYP2C19*2 allele carriers among Caucasian patients after ischemic stroke had a higher risk of major adverse clinical events. The LTA, however, did not predict major adverse clinical events. The exact clinical utility of these findings is still uncertain and requires large outcome-driven randomized trial in Caucasians for proof of concept.