179 research outputs found
The entrepreneur's choice: Venture capital debt financing with adverse selection
This paper studies the consequences of using a debt contract to raise venture capital for an entrepreneurial project in an adverse selection setting with different quality venture capitalists. The paper considers not only the likelihood of success of a one-time project being dependent on the quality of the venture capitalist, but also the problem of a reduced ownership value of future rents from the venture if the venture capitalist takes it over as the result of default of the entrepreneur. Expressions for the face value of debt required for pooling and separating equilibria are also derived. The existence of a separating equilibrium with bad quality venture capitalists is used to show how less reputable venture capitalists can survive in the marketplace. Finally, the paper uses a numerical example to demonstrate why the entrepreneurs of more profitable entrepreneurial firms may prefer to do business with bad quality venture capitalists
The Entrepreneur\u27s Choice: Venture Capital Debt Financing with Adverse Selection
This paper studies the consequences of using a debt contract to raise venture capital for an entrepreneurial project in an adverse selection setting with different quality venture capitalists. The paper considers not only the likelihood of success of a one-time project being dependent on the quality of the venture capitalist, but also the problem of a reduced ownership value of future rents from the venture if the venture capitalist takes it over as the result of default of the entrepreneur. Expressions for the face value of debt required for pooling and separating equilibria are also derived. The existence of a separating equilibrium with bad quality venture capitalists is used to show how less reputable venture capitalists can survive in the marketplace. Finally, the paper uses a numerical example to demonstrate why the entrepreneurs of more profitable entrepreneurial firms may prefer to do business with bad quality venture capitalists
The Staging of Venture Equity Capital and Venture Capitalist Bargaining Power
In this paper we look at the effects of bargaining power on the types of entrepreneurial projects chosen by venture capitalists and show that a wealth-constrained venture capitalist prefers to provide equity financing to a two-stage rather than to a similar single-stage project. While the venture capitalist does not have bargaining power over the entrepreneur of a single-stage project and is thus unable to extract any surplus, the venture capitalist does have this advantage in a two-stage project and, provided the project is good, can demand a portion of the surplus as a pre-condition for providing follow-on capital. This suggests that venture capitalists should stage their capital investments in order to improve their bargaining power, allowing them to earn greater profits from successful entrepreneurial projects
Volatility Clustering and the Bid-ask Spread: Exchange Rate Behaviour in Early Renaissance Florence
Abstract This paper investigates the nature and behavior of the domestic (local) currency market that existed in Florence (Italy) during the late 14th and early 15th centuries (a.k.a. the Early Renaissance). We find that the extant volatility and microstructure models developed for modern asset markets are able to describe the statistical volatility properties observed for the denaro-florin exchange rate. Volatility is clustered and is related to the bid-ask spread. This supports the notion that, although there are huge social, industrial and technological differences between capitalism then and now, individuals trading financial assets in an organized venue behave in a similar manner
Entrepreneurial Stock Brokering and Switching Costs
Stock brokers are entrepreneurs who incur switching costs when the change brokerage houses. We use Helsinki Stock Exchange data to investigate these costs by examining whether investors are loyal to their brokers when brokers move. We find that investors who have extant relationships with the new house are more likely to attract the investors from the old houses, and savvy (knowledgeable) investors are more likely to stay with their broker
The relativistic fluid dual to vacuum Einstein gravity
We present a construction of a (d+2)-dimensional Ricci-flat metric
corresponding to a (d+1)-dimensional relativistic fluid, representing
holographically the hydrodynamic regime of a (putative) dual theory. We show
how to obtain the metric to arbitrarily high order using a relativistic
gradient expansion, and explicitly carry out the computation to second order.
The fluid has zero energy density in equilibrium, which implies
incompressibility at first order in gradients, and its stress tensor (both at
and away from equilibrium) satisfies a quadratic constraint, which determines
its energy density away from equilibrium. The entire dynamics to second order
is encoded in one first order and six second order transport coefficients,
which we compute. We classify entropy currents with non-negative divergence at
second order in relativistic gradients. We then verify that the entropy current
obtained by pulling back to the fluid surface the area form at the null horizon
indeed has a non-negative divergence. We show that there are distinct
near-horizon scaling limits that are equivalent either to the relativistic
gradient expansion we discuss here, or to the non-relativistic expansion
associated with the Navier-Stokes equations discussed in previous works. The
latter expansion may be recovered from the present relativistic expansion upon
taking a specific non-relativistic limit.Comment: 29 pages, 1 figure; v2: added comments and references, published
versio
Airships: A New Horizon for Science
The "Airships: A New Horizon for Science" study at the Keck Institute for
Space Studies investigated the potential of a variety of airships currently
operable or under development to serve as observatories and science
instrumentation platforms for a range of space, atmospheric, and Earth science.
The participants represent a diverse cross-section of the aerospace sector,
NASA, and academia. Over the last two decades, there has been wide interest in
developing a high altitude, stratospheric lighter-than-air (LTA) airship that
could maneuver and remain in a desired geographic position (i.e.,
"station-keeping") for weeks, months or even years. Our study found
considerable scientific value in both low altitude (< 40 kft) and high altitude
(> 60 kft) airships across a wide spectrum of space, atmospheric, and Earth
science programs. Over the course of the study period, we identified
stratospheric tethered aerostats as a viable alternative to airships where
station-keeping was valued over maneuverability. By opening up the sky and
Earth's stratospheric horizon in affordable ways with long-term flexibility,
airships allow us to push technology and science forward in a project-rich
environment that complements existing space observatories as well as aircraft
and high-altitude balloon missions.Comment: This low resolution version of the report is 8.6 MB. For the high
resolution version see: http://kiss.caltech.edu/study/airship
Outlier SNPs detect weak regional structure against a background of genetic homogeneity in the Eastern Rock Lobster, Sagmariasus verreauxi
Genetic differentiation is characteristically weak in marine species making assessments of population connectivity and structure difficult. However, the advent of genomic methods has increased genetic resolution, enabling studies to detect weak, but significant population differentiation within marine species. With an increasing number of studies employing high resolution genome-wide techniques, we are realising that the connectivity of marine populations is often complex and quantifying this complexity can provide an understanding of the processes shaping marine species genetic structure and to inform long-term, sustainable management strategies. This study aims to assess the genetic structure, connectivity, and local adaptation of the Eastern Rock Lobster (Sagmariasus verreauxi), which has a maximum pelagic larval duration of 12 months and inhabits both subtropical and temperate environments. We used 645 neutral and 15 outlier SNPs to genotype lobsters collected from the only two known breeding populations and a third episodic population—encompassing S. verreauxi's known range. Through examination of the neutral SNP panel, we detected genetic homogeneity across the three regions, which extended across the Tasman Sea encompassing both Australian and New Zealand populations. We discuss differences in neutral genetic signature of S. verreauxi and a closely related, co-distributed rock lobster, Jasus edwardsii, determining a regional pattern of genetic disparity between the species, which have largely similar life histories. Examination of the outlier SNP panel detected weak genetic differentiation between the three regions. Outlier SNPs showed promise in assigning individuals to their sampling origin and may prove useful as a management tool for species exhibiting genetic homogeneity
Existential Loneliness and end-of-life care: A Systematic Review
Contains fulltext :
88662.pdf (publisher's version ) (Closed access)Patients with a life-threatening illness can be confronted with various types of loneliness, one of which is existential loneliness (EL). Since the experience of EL is extremely disruptive, the issue of EL is relevant for the practice of end-of-life care. Still, the literature on EL has generated little discussion and empirical substantiation and has never been systematically reviewed. In order to systematically review the literature, we (1) identified the existential loneliness literature; (2) established an organising framework for the review; (3) conducted a conceptual analysis of existential loneliness; and (4) discussed its relevance for end-of-life care. We found that the EL concept is profoundly unclear. Distinguishing between three dimensions of EL-as a condition, as an experience, and as a process of inner growth-leads to some conceptual clarification. Analysis of these dimensions on the basis of their respective key notions-everpresent, feeling, defence; death, awareness, difficult communication; and inner growth, giving meaning, authenticity-further clarifies the concept. Although none of the key notions are unambiguous, they may function as a starting point for the development of care strategies on EL at the end of life.1 april 201
HEART: heart exercise and remote technologies: A randomized controlled trial study protocol
<p>Abstract</p> <p>Background</p> <p>Cardiovascular disease (CVD) is the leading cause of death worldwide. Cardiac rehabilitation (CR) is aimed at improving health behaviors to slow or reverse the progression of CVD disease. Exercise is a central element of CR. Technologies such as mobile phones and the Internet (mHealth) offer potential to overcome many of the psychological, physical, and geographical barriers that have been associated with lack of participation in exercise-based CR. We aim to trial the effectiveness of a mobile phone delivered exercise-based CR program to increase exercise capacity and functional outcomes compared with usual CR care in adults with CVD. This paper outlines the rationale and methods of the trial.</p> <p>Methods</p> <p>A single-blinded parallel two-arm randomized controlled trial is being conducted. A total of 170 people will be randomized at 1:1 ratio either to receive a mHealth CR program or usual care. Participants are identified by CR nurses from two metropolitan hospitals in Auckland, New Zealand through outpatient clinics and existing databases. Consenting participants are contacted to attend a baseline assessment. The intervention consists of a theory-based, personalized, automated package of text and video message components via participants' mobile phones and the Internet to increase exercise behavior, delivered over six months. The control group will continue with usual CR. Data collection occurs at baseline and 24 weeks (post-intervention). The primary outcome is change in maximal oxygen uptake from baseline to 24 weeks. Secondary outcomes include post-intervention measures on self-reported physical activity (IPAQ), cardiovascular risk factors (systolic blood pressure, weight, and waist to hip ratio), health related quality of life (SF-36), and cost-effectiveness.</p> <p>Discussion</p> <p>This manuscript presents the protocol for a randomized controlled trial of a mHealth exercise-based CR program. Results of this trial will provide much needed information about physical and psychological well-being, and cost-effectiveness of an automated telecommunication intervention. If effective, this intervention has enormous potential to improve the delivery of CR and could easily be scaled up to be delivered nationally (and internationally) in a very short time, enhancing the translational aspect of this research. It also has potential to extend to comprehensive CR (nutrition advice, smoking cessation, medication adherence).</p> <p>Trial Registration</p> <p><a href="http://www.anzctr.org.au/ACTRN12611000117910.aspx">ACTRN12611000117910</a></p
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