Virtual geography

Geography and its study are changing in subtle and dramatic ways in the rapid transition to a digital world. Here we present a preliminary discussion of how this new geography, which we call ‘virtual geography’, might be classified. Virtual geography is not merely Cyberspace per se for it comprises many types of place and space in which the digital world finds expression. We define cspace—the space within computers, cyberspace—the use of computers to communicate, and cyberplace—the infrastructure of the digital world, as key components of what Castells¹ refers to as ‘real virtuality’. Virtual geography is all this as well as the study of these worlds from traditional geographic perspectives. Like all classifications, the interesting questions lie at the boundaries between classes—between espace and cyberspace, cyberspace and cyberplace, and between all of these. We illustrate this variety and complexity with examples.     

Non-implementability of Arrow–Debreu equilibria by continuous trading under volatility uncertainty

In diffusion models, a few suitably chosen financial securities allow to complete the market. As a consequence, the efficient allocations of static Arrow–Debreu equilibria can be attained in Radner equilibria by dynamic trading. We show that this celebrated result generically fails if there is Knightian uncertainty about volatility. A Radner equilibrium with the same efficient allocation as in an Arrow–Debreu equilibrium exists if and only if the discounted net trades of the equilibrium allocation display no ambiguity in the mean. This property is violated generically in endowments, and thus Arrow–Debreu equilibrium allocations are generically unattainable by dynamically trading a few long-lived assets.     

Loss-aversion and household portfolio choice

In this paper we empirically test if loss-aversion affects household participation in equity markets, household allocations to equity, and household allocations between mutual funds and individual stocks. Using household survey data, we obtain direct measures of each surveyed household's loss-aversion coefficient from questions involving hypothetical payoffs. We find that higher loss-aversion is associated with a lower probability of participation. We also find that higher loss-aversion reduces the probability of direct stockholding by significantly more than the probability of owning mutual funds. After controlling for sample selection we do not find a relationship between loss-aversion and portfolio allocations to equity.     

The Spillover effect of compulsory insurance

The assumption usually made in the insurance literature that risks are always insurable at the desired level does not hold in the real world: some risks are not—or are only partially—insurable, while others, such as civil liability or health and workers' injuries, must be fully insured or at least covered for a specific amount. We examine in this paper conditions under which a reduction in the constrained level of insurance for one risk increases the demand of insurance for another independent risk. We show that it is necessary to sign the fourth derivative of the utility function to obtain an unambiguous spillover effect. Three different sufficient conditions are derived if the expected value of the exogenous risk is zero. The first condition is that risk aversion be standard—that is, that absolute risk aversion and absolute prudence be decreasing. The second condition is that absolute risk aversion be decreasing and convex. The third condition is that both the third and the fourth derivatives of the utility function be negative. If the expected value of the exogenous risk is positive, a wealth effect is added to the picture, which goes in the opposite direction if absolute risk aversion is decreasing.     

Optimal Disbursement of a Sunk Resource and Decentralised Cost Allocation

We consider whether the allocation of the sunk cost of a central resource to operating divisions can be consistent with economically optimal resource consumption decisions. When it is recognised that the central resource is scarce, one may, in principle, defend the allocation of sunk cost, if it measures the opportunity cost of usage. However, typically it has been proposed that such allocations are, at best, a proxy for opportunity cost. Applying classical control theory techniques in a wide range of operating environments, we are able to identify cost allocations that exactly equal opportunity cost. Hence, for our model environment, we provide a rationale for sunk cost allocation in terms of guiding optimal decisions, in contrast to the traditional defence in terms of providing a proxy for opportunity cost. We demonstrate clearly how cost allocations are related to opportunity costs, and identify the circumstances under which the allocation of full costs or alternatively a fixed proportion (related to acquisition conditions) of costs, results in the implementation of economically optimal resource consumption decisions.     

Behavioral Public Finance: Tax Design as Price Presentation

In this essay we review the evidence from marketing research about price presentation of consumer products and discuss how these lessons have been applied—consciously or unconsciously—in the design of the U.S. tax system. Our perspective is that, in most situations, the designers of the tax system attempt to minimize the perceived burden of any given amount of tax collections. We allow, though, that in certain situations an additional goal is to maximize the perceived burden of others. We also investigate how, when the objective is to encourage a particular activity, price presentation may enhance the achievement of that goal for a given amount of tax subsidy. We conclude by addressing the ethical and normative implications of price presentation in the tax system.     

Are There Optimal Multiple-Reserve Requirements?

A number of developing countries have adopted deficit finance regimes involving multiple- (currency and bond) reserve requirements. A key characteristic of these regimes is that the real interest rates on reservable bonds are higher than the real return rates on currency, so that the nominal interest rates on the bonds are positive. We seek an efficiency-based explanation for the existence of multiple-reserve regimes and for this key characteristic. We find that there are economies in which some of the efficient allocations can be supported only by multiple-reserve requirements, and that positive nominal bond rates may be needed to support some of these allocations. We also find that there are economies in which allocations supported by multiple-reserve regimes with negative nominal bond rates Pareto dominate single-reserve allocations, even when the latter are efficient relative to other single-reserve allocations. Journal of Economic Literature Classification Numbers: E42, E58, H62.     

On the irrelevance of government debt when taxes are distortionary

We consider a government that can only raise funds by levying distortionary taxes. We allow the government to collect taxes in a given period that are based on incomes earned in previous periods. We show that once we do so, given any debt path, the government can adjust its tax policy so as to attain that debt path without affecting equilibrium allocations or prices.     

Oil price and reserve location—Effects on oil and gas sector returns

We provide market evidence of the effects of reserve location on oil and gas (O&G) company returns. Prior studies have shown that commodity sector stock returns are affected by commodity prices. In a new contribution to natural resource valuation literature, returns for 51 O&G companies are shown to be directly and negatively affected by exposures to (location specific) progressive fiscal terms. We add a reserve location proxy—‘R’—to the Fama–French framework; differentiating between companies' performances based on the proportion of oilfield assets subject to progressive tax terms. Companies with oilfield assets owned under progressive production sharing fiscal terms are unable to capture the benefits of oil price increases—and as result significantly under-perform companies with concession asset holdings.     

Cost Management in Sri Lanka: A Case Study on Volume,Activity and Time as Cost Drivers

Despite its theoretical superiority, the activity-based costing (ABC) model has had only moderate success in replacing the traditional volume-based absorption costing models in complex organizations worldwide. Even in organizations that have launched ABC projects, the implementations often do not sustain. In response to this general lack of enthusiasm worldwide for ABC, accountants developed the time-driven activity-based costing (TDABC) model as an alternative cost allocation model. This paper presents a comparison of the TDABC model with ABC, and considers if this alternative cost allocation model (1) is easier to implement from an international perspective and (2) provides comparable cost information for decision making. We use a case study in a country outside the model's country of origin to understand the similarities and differences in absorption costing systems that use ‘volume,’ ‘activities,’ and ‘time’ as the drivers of indirect cost allocations. We also use the case study to ascertain if any country‐specific factors impede ABC implementation. We conclude the following: the TDABC model has similar implementation complexities to ABC if modelling conditions are strictly adhered to; these complexities are independent of country‐specific factors; and in its simplest form, the model generates the same decision information errors of traditional costing.     

Portraits of youth: Understanding young people''s relationship with the future

Young people's relationship with the future is complex and contradictory. Some surveys and commentaries suggest most are optimistic, others that they are pessimistic. Some indicate they are adapted to the postmodern world of rapid change and uncertainty, others that they are anxious and apprehensive. Some of these differences can be readily explained; others require more thorough analysis. We need a better understanding of this relationship if we are to improve both young people's personal well-being and humanity's prospects. It may help if we distinguish between three different images—modern, postmodern and transformational.     

Aggregate implications of indivisible labor, incomplete markets, and labor market frictions

We study the impact of tax and transfer programs on steady-state allocations in a model with search frictions, an operative labor supply margin, and incomplete markets. In a benchmark model that has indivisible labor and incomplete markets but no trading frictions we show that the aggregate effects of taxes are identical to those in the economy with employment lotteries, though individual employment and asset dynamics can be different. The effect of frictions on the response of aggregate hours to a permanent tax change is highly nonlinear. There is considerable scope for substitution between “voluntary” and “frictional” nonemployment in some situations.     

GSEs,Mortgage Rates,and the Long-Run Effects of Mortgage Securitization

Our paper compares mortgage securitization undertaken by government-sponsored enterprises (GSEs) with that undertaken by private firms, with an emphasis on how each type of mortgage securitization affects mortgage rates. We build a model illustrating that market structure, government sponsorship, and the characteristics of the mortgages securitized are all important determinants of mortgage rates. We find that GSEs generally—but not always—lower mortgage rates, particularly when the GSEs behave competitively, because the GSEs implicit government backing allows them to sell securities without the credit enhancements needed in the private sector. Using our simulation model, we demonstrate that when mortgages eligible for purchase by the GSEs have characteristics similar to other mortgages, the GSEs implicit government-backing generates differences in mortgage rates similar to those currently observed in the mortgage market (which range between zero and fifty basis points). However, if the mortgages purchased by GSEs are less costly to originate and securitize, and if the GSEs behave competitively, then the simulated spread in mortgage rates can be much larger than that observed in the data.     

Dynamic Spanning in the Consumption-Based Capital Asset Pricing Model

Under the assumptions of the Consumption-based Capital Asset Pricing Model (CCAPM), Pareto optimal consumption allocations are characterized by each agent's consumption process being adapted to the filtration generated by the aggregate consumption process of the economy. The wealth processes of the agents, however, are adapted to the finer filtration generated by aggregate consumption and the conditional distribution of future aggregate consumption. Therefore, in order to achieve Pareto optimal consumption allocations, a sufficiently varied set of assets must exist such that any wealth process adapted to this finer filtration can be implemented by dynamically trading in that set of assets. We provide sufficient conditions for the existence of such a set of assets based on dynamically trading contingent claims on aggregate consumption. In addition, we give sufficient conditions for the existence of equilibria in a dynamically effectively complete market in which agents are only able to trade in contingent claims on aggregate consumption, the market portfolio of firms, and a (numeraire) zero-coupon bond. We demonstrate the role of short- and long-term contingent claims on aggregate consumption for the implementation of Pareto optimal allocations in the presence of short- andlong-term risks. In addition, in the presence of personal risks, we demonstrate the role of insurance contracts.     

On the relationship between classical chain ladder and granular reserving

We connect classical chain ladder to granular reserving. This is done by defining explicitly how the classical run-off triangles are generated from individual iid observations in continuous time. One important result is that the development factors have a one to one correspondence to a histogram estimator of a hazard running in reversed development time. A second result is that chain ladder has a systematic bias if the row effect has not the same distribution when conditioned on any of the aggregated periods. This means that the chain ladder assumptions on one level of aggregation, say yearly, are different from the chain ladder assumptions when aggregated in quarters and the optimal level of aggregation is a classical bias variance trade-off depending on the data-set. We introduce smooth development factors arising from non-parametric hazard kernel smoother improving the estimation significantly.     

Investment risk allocation and the venture capital exit market: Evidence from early stage investing

This study provides evidence on how venture capitalists’ (VCs’) allocations of capital to riskier investments, as measured by the proportion of early versus late-stage investment in an industry, are linked to exit market conditions. Prior research has primarily focused on how VCs adjust aggregate investment to public equity market conditions. We develop a more inclusive measure of exit market conditions that accounts for recent secular changes that have affected the industry return structure, specifically, the sharp rise in the number of failures and M&A relative to IPO exits. We show that the dollars gained relative to dollars lost in recent exits and failures are significantly positively related to VCs’ allocations to early-stage companies over the period 1990–2008. The changes in allocations are large enough to have an effect on the availability of funding for early stage companies. In sum, our evidence shows that exit market conditions have a significant and economically meaningful influence on VCs’ allocations to riskier investments.     

How performance of risk-based strategies is modified by socially responsible investment universe?

Risk-based allocation strategies, also known as Smart Beta allocations, define the weights of assets in portfolios as functions of the individual and common asset risk. In this paper we focus on the Minimum Variance (MV), Maximum Diversification (MD), Equal Risk Contribution (ERC) and Equal-Weight (EW) risk-based allocation strategies. The popularity of risk-based strategy is commonly justified by their good record of out-performing the cap-weighted (CW) allocation strategy. Because of the low-volatility profile of risk-based allocations this is especially true when crises occur. From March 15, 2002 to May 1, 2012 we investigate how using a socially responsible investment universe impacts performance of risk-based allocation strategies. We use different measures of performance, included risk-adjusted one (multi-factor models), and we propose to disentangle the effect of using a SRI universe from the effect of using risk-based allocations. SRI universe only contains firms that have good environmental, social and governance performance. This kind of filtering is increasingly popular among institutional investors. On the estimation period, using European stocks, we find that the use of the SRI universe has a positive contribution to risk-adjusted performance of risk-based allocations. However this contribution is not uniform among all the risk-based allocation strategies and, can represent only a small part of the total alpha that is observed.     

Towards an Epistemology for Radical Accounting: Beyond Objectivism and Relativism

This paper reviews some of the ontological and epistemological issues confronting writers who are currently pursuing a "radical" critique of "mainstream" accounting thought. This burgeoning heterodoxy has a common point of departure, that mainstream accounting relies upon the received wisdom that the veracity of competing theories may be adjudicated through criteria that appeal to the accuracy of their correspondence with the facts of a cognitively accessible external reality. This dualism between subject and object is both implicitly and explicitly challenged by the radical as they draw attention to, in a variety of ways, the projective role of the epistemic subject. But the maintenance of such a critique requires further epistemological self-reflection if incoherence and relativism are to be avoided. To contribute to the development of this heterodoxy, realism is explored as an epistemological haven from which this critique may be pursued and three key implications are explored through reference to the work of radical accountants.     

Subprime Borrowers: Mortgage Transitions and Outcomes

Public policy concerns increasingly have focused on subprime lending. Our research uses a survey of prime and subprime borrowers to address whether borrowers inappropriately are channeled to the subprime segment, if once having taken out a subprime mortgage borrowers are stuck in this market segment, and whether borrowers face higher costs by taking out subprime mortgages. We find that subprime borrowers are less knowledgeable about the mortgage process, are less likely to search for the best mortgage rates, and are less likely to be offered a choice among alternative mortgage terms and instruments—possibly making them more vulnerable to unfavorable mortgage outcomes. Our analysis of market segmentation confirms that typical mortgage underwriting criteria are most important in explaining whether borrowers obtain prime or subprime mortgages—higher credit risk borrowers are more likely to get a subprime loan. Our results further show that search behavior and other demographic factors including adverse life events, age, and Hispanic ethnicity contribute to explaining market segment, suggesting that borrowers may inappropriately receive subprime mortgages. While we find some persistence to market segment—borrowers are more likely to take out a subprime mortgage if their previous mortgage came from the subprime segment—we also find that market segment is not immutable. Analysis of the survey responses indicates that borrowers with subprime mortgages significantly are more dissatisfied with their mortgage outcomes. This is not surprising because subprime borrowers look worse across typical mortgage underwriting criteria. Consistent with policy concerns, however, despite holding constant these and other factors, taking out a mortgage in the subprime segment, by itself, appears to increase dissatisfaction with mortgage outcomes. We do not provide a definitive answer to the question of whether subprime lending, on balance, serves homebuyers well by providing access to mortgage credit to those otherwise constrained, or rather serves homebuyers poorly by inappropriately assigning them to a market where costs are high and the ability to transition to more attractive prime mortgages remains low. Our analysis, however, does provide some empirical support for concerns raised by critics of subprime lending, and for this reason justifies continued public policy debate and analysis.     

Enterprise resource planning systems, management control and the quest for integration

This paper analyses how two companies pursued integration of management and control through enterprise resource planning (ERP) systems. We illustrate how the quest for integration is an unending process and it is produced concurrently and episodically. Integration is not only about ‘mere’ visibility and control at a distance. ERP systems do not define what integration is and how it is to be developed, but they incur a techno-logic that conditions how control can be performed through financial and non-financial representations because they distinguish between an accounting mode and a logistics mode. A primary lesson from our cases is that control cannot be studied apart from technology and context because one will never get to understand the underlying ‘infrastructure’—the meeting point of many technologies and many types of controls. ERP systems are particularly interesting for what they make impossible, and our cases illustrate how the two organizations in the quest for integration mobilized a number of ‘boundary objects’ to overcome systems-based ‘blind spots’ and ‘trading zones’. The paper points out that management control in an ERP-environment is not a property of the accounting function but a collective affair were local control issues in different parts of the organization are used to create notions of global management.