This paper considers in detail a realistic mortgage valuation model (including the potential for early prepayment and the
risk of default), based on stochastic house-price and interest-rate models. As well as the development of a highly accurate
numerical scheme to tackle the resulting partial differential equations, this paper also exploits singular perturbation theory
(a mathematically rigorous procedure, based on the idea of the smallness of the volatilities), whereby mortgage valuation
can be accurately approximated by very simple closed-form solutions. Determination of equilibrium contract rates, previously
requiring many computational hours is reduced to just a few seconds, rendering this a highly useful portfolio management tool;
these approximations compare favorably with the full numerical solutions. The method is of wide applicability in US or other
mortgage markets and is demonstrated for UK fixed-rate mortgages, including insurance and coinsurance. 相似文献
We extend research on the effects of local audit office characteristics on audit quality by investigating whether audit offices in highly religious U.S. Metropolitan Statistical Areas (MSAs) exhibit going concern decisions that reflect heightened professional skepticism relative to audit offices in less religious MSAs. Prior research links religiosity to risk aversion and ethical development and suggests audit practice offices in more religious MSAs are more likely to issue going concern opinions because they will assess the effects of mitigating factors in a more skeptical manner. Our results indicate that audit practice offices located in highly religious MSAs are more likely to issue going concern audit opinions, consistent with a more skeptical assessment of mitigating factors. Additional tests provide direct evidence consistent with the argument that these audit offices are more risk averse in issuing going concern opinions. Our findings are relevant to auditors, audit clients, researchers, and regulators. 相似文献
Background: A 3-month long treatment of paliperidone palmitate (PP3M) has been introduced as an option for treating schizophrenia. Its cost-effectiveness in Spain has not been established.
Aims: To compare the costs and effects of PP3M compared with once-monthly paliperidone (PP1M) from the payer perspective in Spain.
Methods: This study used the recently published trial by Savitz et al. as a core model over 1 year. Additional data were derived from the literature. Costs in 2016 Euros were obtained from official lists and utilities from Osborne et al. The authors conducted both cost-utility and cost-effectiveness analyses. For the former, the incremental cost per quality-adjusted life-year (QALY) gained was calculated. For the latter, the outcomes were relapses and hospitalizations avoided. To assure the robustness of the analyses, a series of 1-way and probability sensitivity analyses were conducted.
Results: The expected cost was lower with PP3M (4,780€) compared with PP1M (5,244€). PP3M had the fewest relapses (0.080 vs 0.161), hospitalizations (0.034 v.s 0.065), and emergency room visits (0.045 v.s 0.096) and the most QALYs (0.677 v.s 0.625). In both cost-effectiveness and cost-utility analyses, PP3M dominated PP1M. Sensitivity analyses confirmed base case findings. For the primary analysis (cost-utility), PP3M dominated PP1M in 46.9% of 10,000 simulations and was cost-effective at a threshold of 30,000€/QALY gained.
Conclusions: PP3M dominated PP1M in all analyses and was, therefore, cost-effective for treating chronic relapsing schizophrenia in Spain. For patients who require long-acting therapy, PP3M appears to be a good alternative anti-psychotic treatment. 相似文献
Feminist economists identify reciprocity as a motivation for both paid and unpaid caring work. In general, reciprocity describes people responding to each other in similar ways, either benevolently or harmfully. The quality of care is potentially increased when care relationships are motivated by positive and generalized forms of reciprocity and decreased with negative forms of reciprocity. This study draws on nursing literature and two qualitative studies in Australian residential aged care facilities, conducted in 2002–3 and 2009, to identify a new form called “professional reciprocity.” This form of reciprocity involves deliberate and skilled relational work by nurses to facilitate mutual and interdependent exchanges with care recipients that are beneficial to both care recipients and nurses. This study argues that professional reciprocity, as a skill that can be taught, is important for achieving quality care and workers’ job satisfaction. 相似文献
Little research has been conducted on how professional accountants value unlisted shares. The study reported in this paper analyses the accounting and other data drawn from 185 actual unlisted share valuation reports within seven major Canadian accounting firms to estimate a model of and to explain variations in the values placed on unlisted shares. The findings suggest that valuation of unlisted shares can be explained largely in terms of historic accounting data, the main sources being earnings, earnings stability and asset book value. A high degree of consensus on the importance of variables was found across accounting firms. The implications of these findings are discussed. 相似文献
Appropriate exchange rate (ER) policies in some Asian and Latin American countries have led to improvement in industrial diversification and growth. The growth ‘miracle’ of the Asian countries centres on the effective use of ER and trade policies, specifically the adoption of depreciation of real exchange rate (RER). However, the case of Africa is different, as the continent is yet to adopt an appropriate ER policy that enhances industrial diversification and growth. Examining the effectiveness of the RER as a policy tool for industrial diversification and growth in 36 African countries, this study applied a dynamic generalised method of moments (GMM) estimation technique to determine how changes in RER affects the growth composition of the three main productive sectors – primary, secondary, and tertiary and their response rates. Our findings suggest that the primary sector leads to appreciation of the RER, while the secondary and tertiary lead to depreciation of the RER. This result has serious policy implication for the Africa continent that has relied so much on the production of primary commodities. Rather than pursue the policy of ER depreciation which affects the primary and secondary sectors, policy shift in favour of the tertiary sector should be highly encouraged. 相似文献
Inward investment—foreign direct investment in subsidiaries and joint ventures—has played an important part in Europe's post-war development as multinational firms, particularly American multinationals, became a major feature of many European economies. Latterly, we have seen an increasing presence also from Japan and other South-East Asian countries, as well as a resurgence of intra-European investment. What has been the effect of this on the competitiveness of European industry? 相似文献
This study explores possible effects of municipal accounting practices on asset-acquisition decisions. Theoretical decision models are developed using expenditure and depreciation accounting for reporting performance. The models suggest that expenditure accounting may lead to uneconomical leasing. Case studies of three cities focused on comparing present values of their leases to purchase alternatives and on interviewing department administrators. Significant uneconomical leases were found. The case studies suggest that a complete model of municipal administrators' acquisition decisions include consideration of accounting methods used to report performance; perceived risk of obsolescence; restrictions of grantors, third-party reimbursers and higher management; and administrators' background and training. 相似文献