nonrenewable resource scarcity nonrenewable resource theory often is summarized by hotelling s rule this paper reviews theoretical extensions and empirical investigations of resource extraction models observed data are often inconsistent with the hotelling rule suggesting that other characteristics of nonrenewable resource supply including exploration heterogeneous ore quality technological progress and capital investment are important determinants of the dynamic behavior of resource prices given the persistent recurrence of concern about nonrenewable resource scarcity measures of nonrenewable resource scarcity and the empirical evidence for the time trends of those measures are reviewed finally the implications of nonrenewable resource scarcity for economic growth are examined

innovations improvements and the optimal adoption of new technologies abstract this paper extends the literature on technology adoption by introducing a distinction between technological breakthroughs innovations and the engineering refinements improvements that follow such a breakthrough firms do not necessarily wait for a future technological breakthrough but instead have an incentive to delay the adoption of a new technology until it is sufficiently advanced we characterize a firm s adoption decision as the solution to a continuous time infinite horizon dynamic programming problem which gives rise to an ordinary differential equation that is highly non linear and does not have a closed form solution we thus employ projection techniques and show how these techniques can be applied to the analysis of optimal stopping problems

technology adoption in nonrenewable resource management technological change has played an important role in models of nonrenewable resource management since its presence mitigates the depletion effect on extraction costs over time we formalize the problem of a competitive nonrenewable resource extracting firm faced with the possibility of technology adoption based on a quadratic extraction cost function our results show that the expected net benefits from adoption increase both with the size of the resource stock and with prices a boundary that separates the region where expected net benefits are positive from the one where they are negative is derived

management ownership and market valuation an empirical analysis we investigate the relationship between management ownership and market valuation of the firm as measured by tobin s q in a 1980 cross section of 371 fortune 500 firms we find evidence of a significant nonmonotonic relationship tobin s q first increases then declines and finally rises slightly as ownership by the board of directors rises for older firms there is evidence that q is lower when the firm is run by a member of the founding family than when it is run by an officer unrelated to the founder

technological expectations and adoption of improved technology abstract attention is focused upon the adoption demand rather than the creation supply of new technology which improves from time to time based on the expected flow of technological progress over which the firm demander has no control it must decide either to adopt the current best available technology or to postpone adoption the distinguishing features of the model are that more than one technological innovation is anticipated and expectations about the likelihood of such innovations are revised as time passes since the last innovation our analysis shows that the firm will adopt the current best practice if its technological lag exceeds a certain threshold moreover as time passes without new technological advances it may become profitable to purchase a technology that has been available even though it was not profitable to do so in the past

optimal timing problems in environmental economics abstract because of the uncertainties and irreversibilities that are often inherent in environmental degradation its prevention and its economic consequences environmental policy design can involve important problems of timing i use a simple two period model to illustrate these optimal timing problems and their implications for environmental policy i then lay out and solve a continuous time model of policy adoption in which the policy itself entails sunk costs and environmental damage is irreversible the model generalizes earlier work in that it includes two stochastic state variables one captures uncertainty over environmental change and the other captures uncertainty over the social costs of environmental damage solutions of the model are used to show the implications of these two types of uncertainty for the timing of policy adoption

general equilibrium electricity generation technologies and the cost of carbon abatement a structural sensitivity analysis abstract electricity generation is a major contributor to carbon dioxide emissions and abatement in this sector is a key determinant of economy wide regulation costs the complexity of an integrated representation of economic and electricity systems makes simplifying assumptions appealing but there is no evidence in the literature on how important the pitfalls may be the aim of this paper is to provide such evidence drawing on numerical simulations from a suite of partial and general equilibrium models that share common technological features and are calibrated to the same benchmark data we report two basic findings first general equilibrium inter sectoral effects of an economy wide carbon policy are large it follows that assessing abatement potentials and price changes in the electricity sector with a partial equilibrium marshallian demand can only provide a crude approximation of the complex demand side interactions second we provide evidence that widely used top down representations of electricity technologies produce fuel substitution patterns that are inconsistent with bottom up cost data this supports the view that the parametrization of substitution possibilities with highly aggregated production functions is difficult to validate empirically the overall picture that emerges is one of large quantitative and even qualitative differences highlighting the role of key structural assumptions in the interpretation of climate policy projections

the disciplinary role of takeovers this paper presents a theory of the disciplinary role of takeovers based on an explicit model of managerial incentive problems stemming from asymmetric information it is argued that an informed raider can reduce incentive problems by making managerial compensation more sensitive to information unavailable to shareholders the paper also highlights the importance of specifying the source of contractual inefficiencies when analyzing the effect of takeovers on incentives

impact of firm performance expectations on ceo turnover and replacement decisions abstract our analysis suggests that boards focus on deviation from expected performance rather than performance alone in making the ceo turnover decision especially when there is agreement less dispersion among analysts about the firm s earnings forecast or there are a large number of analysts following the firm in addition our results suggest that boards are more likely to appoint a ceo that will change firm policies and strategies i e an outsider when forecasted 5 year eps growth is low and there is greater uncertainty more dispersion among analysts about the firm s long term forecasts

ownership concentration corporate control activity and firm value evidence from the death of inside blockholders we analyze how ownership concentration affects firm value and control of public companies by examining effects of deaths of inside blockholders we find shareholder wealth increases ownership concentration falls and extensive corporate control activity ensues share price responses are related to the deceased s equity stake control group holdings fall for two thirds of the firms due to either the estate s dispersal or inheritors selling stock a majority of firms become targets of control bids three quarters of bids are successful one third are hostile our evidence is broadly consistent with stulz s 1988 model of the relationship between ownership concentration and firm value the objective of this paper is to assess how changes in insider ownership concentration affect firm value corporate governance and the control of public companies we obtain our evidence on these issues by examining the effects of the death of an inside blockholder that is a member of the firm s control group as defined by securities and exchange commission sec disclosure rules who holds 5 percent or more of a firm s equity overall we find that the death of an inside blockholder an exogenous event is value enhancing reduces ownership concentration and leads to extensive corporate control activity our analysis has three components one we use market based evidence to evaluate how changes in ownership concentration affect firm value by analyzing the share price response to the death of an inside blockholder financial market efficiency implies that share prices capitalize gains or losses from changes in ownership concentration and future control events expected to ensue from an inside blockholder s death thus such valuation effects provide a test of the continuing controversy as to whether ownership concentration promotes managerial entrenchment or aligns insider and noninsider interests we find that the share price response to the death of an inside blockholder is significantly positive when the level of ownership concentra

integrating information about the cost of carbon through activity based costing abstract environmental protection has been an issue of serious concern for many years it is not a trend but the responsibility of corporations this responsibility for environmental protection should be internalized into business operations prior to production in order to reflect the true cost of the final product due to the use of traditional cost accounting many organizations have not estimated their environmental costs precisely therefore environmental accounting systems such as carbon management accounting environmental management accounting and greenhouse gas accounting have attracted worldwide attention in this paper we propose an integrated concept the activity based costing approach to solve the problem of environmental and cost evaluation we include a case study of an existing pulp and paper company in taiwan to show that the activity based costing method estimates emissions of waste and the environmental costs of a final product more accurately than traditional approaches do the method can therefore provide information for use in existing environmental accounting systems and help managers incorporate environmental costs into their decision making processes

inequality and poverty in united states the effects of rising dispersion of men s earnings and changing family behaviour using semiparametric density estimation techniques we analyse the effect of rising dispersion of men s earnings and related changes in family behaviour on increasing inequality in the distribution of family income in the united states for the period 1969 1989 the growing dispersion of men s earnings and changing family structure can account for most of the rise in family income inequality by contrast the increase in labour force participation by women offset this trend inequality grew at a slower rate in the 1990s than in earlier decades largely because of stabilization in the relative earnings of men from low income families

an analysis of the stock price reaction to sudden executive deaths implications for the managerial labor market abstract certain characteristics of managerial employment arrangements and of the managerial labor market make shareholder wealth dependent on an executive s continued employment these wealth effects are investigated by examining the common stock price reaction to unexpected deaths of senior corporate executives abnormal stock price changes are documented for a sample of fifty three events these abnormal stock price changes are associated with the executive s status as a corporate founder and with measures of the executive s talents and decision making responsibility and of the transaction costs associated with renegotiating or terminating the employment agreement

the time path of scarcity rent in the theory of exhaustible resources there is now a consensus in the literature on resource economics that a depletable resource should command a price in excess of its marginal extraction cost simply to reflect the opportunity cost of using a unit of it today rather that conserving it for the future but how this excess is to change along an optimal or competitive equilibrium path of resource use is still an unresolved question this might at first seem puzzling since according to the fundamental theorem of economics of exhaustible resources or hotelling i 93 i rule on an optimal path price minus marginal extraction cost also termed interchangeably as scarcity rent user cost or royalty should steadily grow over time at the social rate of discount however the literature contains sharply contrasting views on the subject for example kay and mirrlees 1975 have argued that since along an optimal path the scarcity rent grows exponentially as a finite stock of a resourcexnears exhaustion then situations in which the resource stock is still very large and yet the price greatly exceeds the marginal extraction cost should indicate that the price is significantly above its optimal level and that the resource is overconserved in stark contrast to this view heal i976 has argued that as the resource stock nears exhaustion the difference between price and marginal cost or what he termed social cost of extraction falls monotonically to zero hanson i980 analyses the same model as heal s but unlike heal who assumes the unit extraction cost to be convex he postulates it to be concave and yet like heal concludes that the scarcity rent will be monotonically declining over time solow and wan i976 analyse a still different situation where resource deposits differ in quality and the unit extraction cost increases as higher grade deposits are exhausted and extraction proceeds to lower grades they show that along an optimal path the shadow price of a resource must rise at the real rate of interest despite differential extraction costs but that the difference between price and the marginal extraction cost or what they call degradation charge declines monotonically over time to zero these sharply differing conclusions suggest that far from being resolved the question of how scarcity rent changes over time is much in want of a close scrutiny the need for such a scrutiny becomes even stronger once it is noted

optimal timing of technology adoption abstract in a dynamic programming framework this paper investigates the optimal timing of technology adoption by a competitive firm when technology choice is irreversible and the firm faces a stochastic innovation process with uncertainties about both the speed of the arrival and the degree of improvement of new technologies a numerical example illustrates how the optimal timing decision is affected by changes in parameter values reflecting market conditions the firm s initial technological attributes and the characteristics of the stochastic innovation process some of these effects turn out to be in sharp contrast to common intuition contrasting the optimal decision rule derived here with the rule obtained under the net present value shows that the former implies a slower pace of adoption than implied by the latter the optimal decision rule is generalized for the case of multiple technology switches and it is shown that for all the switching decisions except the last one the optimal rule satisfies the net present value criterion

inside the family firm the role of families in succession decisions and performance this paper uses a unique dataset from denmark to investigate the impact of family characteristics in corporate decision making and the consequences of these decisions on firm performance we focus on the decision to appoint either a family or an external chief executive officer ceo the paper uses variation in ceo succession decisions that result from the gender of a departing ceo s first born child this is a plausible instrumental variable iv as male firstchild firms are more likely to pass on control to a family ceo relative to female first child firms but the gender of a first child is unlikely to affect firms outcomes we find that family successions have a large negative causal impact on firm performance operating profitability on assets falls by at least four percentage points around ceo transitions our iv estimates are significantly larger than those obtained using ordinary least squares furthermore we show that family ceo underperformance is particularly large for firms in high growth industries and for relatively large firms overall the empirical results demonstrate that professional non family ceos provide extremely valuable services to the organizations they head

technological change and the dynamics of resource scarcity measures abstract within a general competitive model of resource extraction this paper investigates the effect of technological change on the time paths of resource scarcity measures cost price and rent and the possible relationship between them it shows that the effect of technological change depends crucially on whether it is extraction biased or depletion biased it derives conditions under which the three measures move together and when they do not it argues in favor of rent as a more reliable indicator of scarcity change the theoretical insights obtained here help to explain both the sharp contrast of empirical results regarding the time trend of a specific measure as well as the observed lack of harmony among the time paths of the measures

the equal importance of asset allocation and active management what is the relative importance of asset allocation policy versus active portfolio management in explaining variability in performance considerable confusion surrounds both time series and cross sectional regressions and the importance of asset allocation cross sectional regressions naturally remove market movements therefore the cross sectional results in the literature are equivalent to analyses of excess market returns even though the regressions were performed on total returns in contrast time series analyses of total returns do not naturally remove market movements time series analyses of excess market returns and cross sectional analyses of either total or excess market returns however are consistent with each other with market movements removed asset allocation and active management are equally important in determining portfolio return differences within a peer group finally an examination of period by period cross sectional results reveals why researchers using the same regression technique can get widely different results

entrenchment governance and the stock price reaction to sudden executive deaths abstract to study managerial entrenchment i use the stock price reaction to unexpected senior executive deaths if a highly effective manager dies unexpectedly the stock price reaction should be negative if however death removes an entrenched manager when the board would or could not the stock price reaction should be positive while individually age and tenure only weakly correlate with the stock price reaction to a sudden death the reaction is strongly positive 6 8 if 1 the executive s tenure exceeds 10 years and 2 abnormal stock returns over the last three years are negative

deconstructing income and income inequality measures a crosswalk from market income to comprehensive income recent research on levels and trends in the united states in income inequality vary substantially in how they measure income we show the sensitivity of alternative income measures in capturing income trends using a unified data set focusing solely on market income or including realized taxable capital gains based on irs tax return data in more comprehensive household income measures will dramatically increase inequality growth compared to capital gains measures more in keeping with haig simons principles using a measure of yearly accrued capital gains dramatically reduces observed growth in income inequality across the distribution but also equalizes income growth since 1989