Search results for "RANSAC"

European Option Pricing and Hedging with Both Fixed and Proportional Transaction Costs

2003

Abstract In this paper we provide a systematic treatment of the utility based option pricing and hedging approach in markets with both fixed and proportional transaction costs: we extend the framework developed by Davis et al. (SIAM J. Control Optim., 31 (1993) 470) and formulate the option pricing and hedging problem. We propose and implement a numerical procedure for computing option prices and corresponding optimal hedging strategies. We present a careful analysis of the optimal hedging strategy and elaborate on important differences between the exact hedging strategy and the asymptotic hedging strategy of Whalley and Wilmott (RISK 7 (1994) 82). We provide a simulation analysis in order …

American Option Pricing and Exercising with Transaction Costs

2005

In this paper we examine the problem of finding the reservation option prices and corresponding exercise policies of American options in a market with proportional transaction costs using the utility based approach proposed by Davis and Zariphopoulou (1995). We present a model where the option holder has a constant absolute risk aversion. We discuss the numerical algorithm and propose a new characterization of the option holder's value function. We suggest original discretization schemes for computing reservation prices and exercise policies of American options. The discretization schemes are implemented for the cases of American put and call options. We present the study of the optimal tra…

Indicators of improved learning contexts : a collaborative perspective on educational leadership

2015

The aim of this paper is to illustrate indicators for improved learning contexts based on the notion of collaborative leadership. Collaborative leadership refers to synergetic educational leadership practices through co-performance and a continuous and shared learning process. We argue that the indicators could serve as a bridge between education and the complex and increasing change within the social life and world of work. For finding the indicators, we combined two intertwining dimensions: ‘leadership in education’ and ‘education for leadership’. They were studied by a tested model describing collaborative leadership by a set of attributes. We then applied these attributes to a curriculu…

Symbolic leadership and leadership culture in one unified comprehensive school in Finland

2012

The research presented in this article is a description of the symbolic leadership and leadership culture in one unified comprehensive school in Finland. The study is a phenomenological qualitative case study based on triangulation. Leadership is studied through its functional, verbal and material dimensions. Leadership culture is regarded as one of the part cultures of the organisation culture. It is a product of the meaning and interpretation process which forms itself through the symbols of the principal's leadership. According to the present study, the leadership culture of the unified comprehensive school can be described as consisting of respect, communality, equality and humour.

Talking Blockchains: The Perspective of a Database Researcher

2021

There are few topics out there, that seem to create as much confusion and discussion as blockchains. This has a multitude of reasons: (1) A large number of drastically different concepts and systems are unified under the very broad term "blockchain". (2) The topic touches a variety of different fields, including databases, distributed processing, networks, cryptography, and even economics. (3) There exists a large number of different applications of the technology.The goal of this paper is to simplify and structure the discussion of blockchain technology. We first introduce a simple formalization of the basic components, that appear again and again in a variety of blockchain systems. Second…

A Unified Approach to Portfolio Optimization with Linear Transaction Costs

2004

In this paper we study the continuous time optimal portfolio selection problem for an investor with a finite horizon who maximizes expected utility of terminal wealth and faces transaction costs in the capital market. It is well known that, depending on a particular structure of transaction costs, such a problem is formulated and solved within either stochastic singular control or stochastic impulse control framework. In this paper we propose a unified framework, which generalizes the contemporary approaches and is capable to deal with any problem where transaction costs are a linear/piecewise-linear function of the volume of trade. We also discuss some methods for solving numerically the p…

Mental Account Barriers and Transaction Purpose: A Romanian Point of View

2013

Abstract The present study encompasses the behavioral model of decision making. Using the models provided by scientific literature, the relationship between the basic structure of mental accounts, transaction utility and consumer decision, together with perceived comfortability. The procedure was carried out using undergraduate students of Lucian Blaga University of Sibiu, with similar proportions of sexes and with resembling ages. Results have shown that influence of mental accounting structuring and transaction utility on decision and perceived comfortability is insignificant, taken into account the differences between sexes. The presented results bring knowledge into the economic behavio…

The relationship between interdisciplinarity and distinct modes of university-industry interaction

2019

Abstract Interdisciplinary research (IDR) has raised increasing expectations among scholars and policymakers about its potential to produce ground-breaking scientific contributions and satisfy societal demands. While existing research highlights that novel connections across fields is beneficial for scientific contributions with high academic impact, comparatively less is known about whether IDR is positively associated to scientists’ engagement with non-academic actors. To investigate this, we examine whether there is a systematic relationship between scientists’ IDR-orientation and their interactions with industry. We conceptually distinguish four stylized modes of interaction (firm creat…

Inter-firm relationship design for achieving supply network responsiveness

2008

How the strategic objectives pursued in inter-firm relationships influence the choice of the governance form: an empirical study in two high-tech Ita…

2012

In today’s competitive landscape, the choice of the appropriate mode to governance an inter-firm relationship is an important factor for companies. In literature several theoretical strands have examined the impact of the alliance purpose on the governance forms. Building on a robust literature review on the topic, this study focuses on a specific issue influencing the choice of the governance form in inter-firm relationships, i.e. the alliances’ purpose with relation to partner’s resources. We gather in a unique framework three typologies of partner’s resources, i.e. production, R&D and marketing, and through two empirical analyses in two different Italian industries, machine tool and phar…