the empirical analysis of the determinants for environmental technological change a research agenda abstract technological change is usually considered a necessary albeit not sufficient condition for a transition to sustainability however the empirical analysis of the determinants to environmental technological change has not received too much attention in the environmental ecological economics literature and many open questions remain in this context based on a careful review of the literature this paper argues that further analysis should address several issues at different levels i e regarding the conceptual framework the thematic scope of the studies some methodological issues and other aspects related to the environmental policy variable first an integrated conceptual framework which takes into account the interplay between relevant variables influencing environmental technological change i e factors internal and external to the firm and characteristics of the environmental technologies and all the stages of this process with a greater emphasis on the invention stage should be developed other aspects should then be tackled including a focus on several themes i e a greater attention to cross sectoral technologies the barriers to different types of environmental technologies the international dimension of environmental technological change and environmental technological change in small and medium size enterprises methodological issues combination of case studies and econometric modelling and several issues related to the environmental policy variable

identifying roles of international institutions in clean energy technology innovation and diffusion in the developing countries matching barriers with roles of the institutions abstract the development of clean energy technologies is a central issue in climate change negotiation the signatory countries to the united nations convention on climate change agreed to organize the technology executive committee and the climate technology centre and network the objectives of this paper are twofold the first objective is to show a broad landscape of barriers in technology development the paper summarizes the results of key case studies that were conducted to uncover technology specific barriers in technology development these case studies include both technologies for industrial use such as wind bio energy and building energy efficiency and technologies for individual use such as light emitting diodes and photovoltaic panels the case studies also contain technologies at the innovation stage such as integrated gasification combined cycle and carbon capture and storage the second objective of this paper is to highlight and define roles of international institutions in overcoming identified barriers in clean energy technology development in this paper four areas of focus for international institutions are discussed including 1 increasing r d cooperation at the innovation stage 2 facilitation of intellectual property rights 3 supporting finance and 4 enhancing the enabling environment at the diffusion stage

segmentation of the indian photovoltaic market this paper provides an analytical framework studying the actors networks and institutions and examines the evolution of the indian solar photovoltaic pv market different market segments along the lines of demand and supply of pv equipment i e on the basis of geography end use application subsidy policy and other financing mechanisms are detailed the objective of this effort is to identify segments that require special attention from policy makers donors and the ministry of non conventional energy sources the paper also discusses the evolution of the commercial pv market in certain parts of the country and trends in the maturity of the market

the optimal research and development portfolio of low carbon energy technologies a study of china to support decision making for an optimal portfolio strategy for low carbon energy technology research and development r d this study proposes a dynamic two stage stochastic programming model taking into account both the uncertainty of technological change and damages of climate change based on china s economic and technology level and expert elicitation an r d investment portfolio strategy looking at three low carbon technologies carbon capture and storage ccs solar photovoltaic pv and nuclear including nine projects is investigated through the proposed model the optimized results show that the optimal r d technology portfolio is robust to different levels of risk in climate damage however the total social costs for the optimal r d technology portfolio is lowest in the medium risk of climate damage scenario under different opportunity costs the composition of the optimal r d portfolio varies however projects for each of the three technologies always constitute the optimal r d portfolio furthermore the implication is that a technology synergistic r d strategy is conducive to enhancing the level of co2 abatement and reducing the total social cost

social security privatization a structure for analysis this paper identifies the key economic issues that must be addressed in the debate over a privatized social security system we examine a two pillar plan the first pillar would consist of a demogrant a small indexed pension of the same dollar amount for all retirees who had contributed to the system over a full lifetime of work the second pillar would consist of a fully funded individual defined contribution account financed by payroll taxes held in financial institutions and directed by participants we explore how such a system would affect the risks households face how it would alter the distribution of income and how it might influence household behavior including incentives to work and save and portfolio choices we also examine macroeconomic issues how the transition to a private plan would occur and what the likely effects would be on national saving we conclude that a two pillar system offers several positive features namely a reduction in political risk an increase in household portfolio choice and improved work incentives disadvantages include less redistributiveness and national risk sharing and increased administrative costs this abstract was borrowed from another version of this item

revisiting the home bias puzzle downside equity risk deviations from normality in financial return series have led to the development of alternative portfolio selection models one such model is the downside risk model whereby the investor maximizes his return given a downside risk constraint in this paper we empirically observe the international equity allocation for the downside risk investor using nine international markets returns over the last 34 years the results hold for both daily and monthly data and also from an international perspective due to greater downside risk investors may think globally but instead act locally the model s results therefore provide an alternative view of the home bias puzzle

the adequacy of investment choices offered by 401k plans abstract the choices made by 401 k participants are the product of two different decisions what is offered and what is chosen while there have been a number of studies of the decisions made by participants in 401 k plans there have been no studies of the adequacy of the full set of choices offered to 401 k participants this paper analyzes the adequacy and characteristics of the choices offered to 401 k plan participants for over 400 plans we find that only 53 of the plans offer an adequate set of options and that over a 20 year period offering inadequate options makes a difference in terminal wealth of over 53 we find that funds included in the plans are riskier but have a slightly higher return than the general population of funds in the same categories however we find that the return difference is roughly equal to the difference in expenses between funds selected by plans and randomly selected funds we study the characteristics of plans that are associated with adequate investment choices including an analysis of the use of company stock plan size and the use of sophisticated strategies

portfolio claustrophobia asset pricing in markets with illiquid assets many classes of assets are illiquid or nonmarketable in that they cannot always be traded immediately thus a portfolio position in these becomes at least tem porarily irreversible we study the asset pricing implications of this type of illiquidity in an exchange economy with heterogeneous agents in this market one asset is always liquid the other asset can be traded initially but then not again until after a blackout period illiquidity has a dramatic effect agents abandon diversification and choose polarized portfolios instead the value of liquidity can represent a large portion of the equilibrium price of an asset jel g11 g12

choice simplification a theory of mental budgeting and naive diversification we develop a theory of how an agent makes basic multiproduct consumption decisions in the presence of taste consumption opportunity and price shocks that are costly to attend to we establish that the agent often simplifies her choices by restricting attention to a few important considerations which depend on the decision at hand and affect her consumption patterns in specific ways if the agent s problem is to choose the consumption levels of many goods with different degrees of substitutability then she may create mental budgets for more substitutable products e g entertainment in some situations it is optimal to specify budgets in terms of consumption quantities but when most products have an abundance of substitutes specifying budgets in terms of nominal spending tends to be optimal if the goods are complements in contrast then the agent may consistent with naive diversification choose a fixed unconsidered mix of products and if the agent s problem is to choose one of multiple products to fulfill a given consumption need e g for gasoline or a bed then it is often optimal for her to allocate a fixed sum for the need

five steps to planning success experimental evidence from us households while financial knowledge has been linked to improved financial behaviour there is lit tle consensus on the value of financial education in part because rigorous evaluation of various programmes has yielded mixed results however given the heterogeneity of financial education pro grammes in the literature focusing on generic financial education can be inappropriate and even mis leading lusardi 2009 and others argue that pedagogy and delivery matter significantly in this paper we design and field a low cost easily replicable financial education programme called five steps covering five basic financial planning concepts that relate to retirement we conduct a field experiment to evaluate the overall impact of five steps on a probability sample of the american population in different treatment arms we quantify the relative impact of delivering the programme through video and narrative formats our results show that short videos and narratives each takes about 3 minutes have sizeable short run effects on objective measures of respondent knowledge moreover keeping informational content relatively constant format has significant effects on other psychological levers of behavioural change effects on self efficacy are significantly higher when videos are used which ultimately influences knowledge acquisition follow up tests of respondents knowledge approximately 8 months after the interventions suggest that between one quarter and one third of the knowledge gain and about one fifth of the self efficacy gain persist thus this simple programme has effects both in the short run and medium run

when micro prudence increases macro risk the destabilizing effects of financial innovation leverage and diversification by exploiting basic common practice accounting and risk management rules we propose a simple analytical dynamical model to investigate the effects of microprudential changes on macroprudential outcomes specifically we study the consequence of the introduction of a financial innovation that allows reducing the cost of portfolio diversification in a financial system populated by financial institutions having capital requirements in the form of value at risk var constraint and following standard mark to market and risk management rules we provide a full analytical quantification of the multivariate feedback effects between investment prices and bank behavior induced by portfolio rebalancing in presence of asset illiquidity and show how changes in the constraints of the bank portfolio optimization endogenously drive the dynamics of the balance sheet aggregate of financial institutions and thereby the availability of bank liquidity to the economic system and systemic risk the model shows that when fin

optimal portfolio choice with wash sale constraints abstract we analytically solve the portfolio choice problem in the presence of wash sale constraints in a two period model with one risky asset our results show that wash sale constraints can heavily affect portfolio choice of investors with unrealized losses the trading behavior of such investors is to a large extent driven by the desire to realize those losses either immediately by sharply decreasing the holding of assets carrying unrealized losses or indirectly by increasing such holdings in order to prepare for a decrease in a future period to earn the tax rebate payment our findings are robust to increasing the number of trading dates and introducing a second risky asset and a correlation structure

optimal diversification and risk taking a theoretical and empirical analysis among the justifications for capital property income received by private households is that it is a return to risk taking however portfolio diversification provides an obvious means toward the reduction of risk moreover it is widely believed that the wealthier the household the more diversification it practices the larger tends to be the proportion of its total portfolio allocated to publicly traded stock and the larger tends to be the number of individual stock issues included in its portfolio using a simple homogeneous securities model explicit functional forms are obtained for both the optimal proportion of the portfolio allocated to stocks and the optimal number of individual stock issues in the portfolio empirical evaluation of these theoretical results using a dataset derived from the 2004 survey of consumer finances scf lends substantial support to the model applying these empirical results it is found that as household capital wealth increases expected capital income increase

naive diversification strategies in defined contribution saving plans there is a worldwide trend toward defined contribution saving plans and growing interest in privatized social security plans in both environments individuals are given some responsibility to make their own asset allocation decisions raising concerns about how well they do at this task this paper investigates one aspect of the task namely diversification it is shown that some investors follow the 1 n strategy they divide their contributions evenly across the funds offered in the plan consistent with this naive notion of diversification it is found that the proportion invested in stocks depends strongly on the proportion of stock funds in the plan

why does the law of one price fail an experiment on index mutual funds we conduct an experiment to evaluate why individuals invest in high fee index funds in our experiments subjects allocate 10 000 across four s p 500 index funds and are rewarded for their portfolio s subsequent return subjects overwhelmingly fail to minimize fees we can reject the hypothesis that subjects buy high fee index funds because of bundled non portfolio services search costs for fees matter but even when we eliminate these costs fees are not minimized instead subjects place high weight on annualized returns since inception fees paid decrease with financial literacy interestingly subjects who choose high fee funds sense they are making a mistake

genetic variation in financial decision making individuals differ in how they construct their investment portfolios yet empirical models of portfolio risk typically account only for a small portion of the cross sectional variance this paper asks whether genetic variation can explain some of these individual differences following a major pension reform swedish adults had to form a portfolio from a large menu of funds we match data on these investment decisions with the swedish twin registry and find that approximately 25 of individual variation in portfolio risk is due to genetic variation we also find that these results extend to several other aspects of financial decision making

three is a crowd exploring the potential of crowdfunding for renewable energy in the netherlands there is a huge gap between demand and supply of finance for energy transitions and the financial and economic crisis have had a negative impact in the already meagre funds for transforming the energy system towards renewable sources in this paper we explore whether crowdfunding for renewable energy as a novel sociotechnical practice developed in a niche has the potential to break through and transform both the energy and the financial regimes utilising the multi level perspective theory we empirically investigate crowdfunding platforms linked to renewable electricity projects in the netherlands the main conclusion is that the volume of crowdfunding today is low but the dynamic of these projects holds potential there is limited indication of learning processes until now as well as limited support from regime actors pointing at a low level of niche stabilization and break through potential which may however be related to the early stage of development of crowdfunding in the netherlands on the other hand the heterogeneity of crowdfunders is very promising platforms dedicated to renewable electricity exclusively and with an investment based business model seem to be the most successful we show how governmental market regulation and support mechanisms are shaping crowdfunding as a business model and discuss the implications for other countries

the socioeconomic determinants of ill gotten gains within person changes in drug use and illegal earnings generalizing from the sociology of earnings attainment we develop a conceptual model of social embeddedness in conventional and criminal activities to explain illegal earnings among criminal offenders to isolate the effects of time varying factors such as legal earnings drug use and criminal opportunities we use data from the national supported work demonstration project to estimate fixed effects models predicting month to month changes in illegal earnings we find that criminal earnings are sensitive to embeddedness in conforming work and family relationships criminal experience and the perceived risks and rewards of crime moreover heroin and cocaine use creates a strong earnings imperative that is difficult to satisfy in the low wage labor market and offenders earn far more money illegally when they are using these drugs than during periods of abstinence

evidence of demand for index insurance experimental games and commercial transactions in ethiopia abstractwe present results of experimental games with smallholder farmers in tigray ethiopia in 2010 in which participants in the games allocated money across risk management options one of the options was index insurance that was the same as commercial products sold locally participants exhibited clear preferences for insurance contracts with higher frequency payouts and for insurance over other risk management options including high interest savings the preference for higher frequency payouts is mirrored in commercial sales of the product with commercial purchasers paying substantially higher premiums than the minimal low frequency option available this combined evidence challenges claims that the very poor universally choose minimal index insurance coverage and supports concerns that demand may outpace supply of responsible insurance products

a social capital paradox entrepreneurial dynamism in a small world clean technology cluster abstract clean tech entrepreneurs have struggled to gain investor confidence because of some particular characteristics and circumstances of the industry this research combines network and sustainable development literature in the clean tech context to support the logic of a new investment approach that may stimulate sustainable investing in clean tech theory is proposed to suggest that there may be an advantageous social capital paradox where strong ties in a cluster lead to dynamism rather than decay the clean tech industry provides a context where strong ties offer network stability in a small world cluster such that it is a value creating organizational form offering greater dynamism two related propositions are developed to support the social capital paradox they lead to a theoretical conclusion that long term integrated partner solutions where partners are also resource constrained lead to successful alliances supporting a dynamic cluster that will grow over time a practical conclusion is that investing in a connected cluster of firms might be less risky compared to investing in a new firm or even a portfolio of well diversified assets de risking clean production investments may be achievable through a small world network cluster backed security

an asset allocation puzzle this paper examines popular advice on portfolio allocation among cash bonds and stocks it documents that this advice is inconsistent with the mutual fund separation theorem which states that all investors should hold the same composition of risky assets in contrast to the theorem popular advisors recommend that aggressive investors hold a lower ratio of bonds to stocks than conservative investors the paper explores various possible explanations of this puzzle and finds them unsatisfactory copyright 1997 by american economic association

diversification versus optimality is there really a diversification puzzle abstractin this paper we provide a general valuation of the diversification attitude of investors first we empirically examine the diversification of mean variance optimal choices in the us stock market during the 11 year period 2003 2013 we then analyze the diversification problem from the perspective of risk averse investors and risk seeking investors second we prove that investors optimal choices will be similar if their utility functions are not too distant independent of their tolerance or aversion to risk finally we discuss investors attitude towards diversification when the choices available to investors depend on several parameters

portfolio selection with mental accounts and background risk abstract das et al 2010 develop a model where an investor divides his or her wealth among mental accounts with motives such as retirement and bequest nevertheless the investor ends up selecting portfolios within mental accounts and an aggregate portfolio that lie on the mean variance frontier importantly they assume that the investor only faces portfolio risk in practice however many individuals also face background risk accordingly our paper expands upon theirs by considering the case where the investor faces background risk our contribution is threefold first we provide an analytical characterization of the existence and composition of the optimal portfolios within accounts and the aggregate portfolio second we show that these portfolios lie away from the mean variance frontier under fairly general conditions third we find that the composition and location of such portfolios can differ notably from those of portfolios on the mean variance frontier

in defense of optimization the fallacy of 1 n previous research has shown that equally weighted portfolios outperform optimized portfolios which suggests that optimization adds no value in the absence of informed inputs this article argues the opposite with naive inputs optimized portfolios usually outperform equally weighted portfolios the ostensible superiority of the 1 n approach arises not from limitations in optimization but rather from reliance on rolling short term samples for estimating expected returns this approach often yields implausible expectations by relying on longer term samples for estimating expected returns or even naively contrived yet plausible assumptions optimized portfolios outperform equally weighted portfolios out of sample

household portfolio diversification a case for rank dependent preferences the proliferation of novel preference theories in financial economics is hampered by a lack of non experimental evidence and by the theories additional complexity which has not been shown to be critical in applications in this article i present arguments in support of preferences with rank dependency using the survey of consumer finances data i document two widespread patterns inconsistent with expected utility i many households simultaneously invest in well deversified funds and in poorly diversified portfolios of stocks and ii some households with substantial savings do not invest anything in equities i show that portfolio choice models with rank dependent preferences plausibly parameterized and under fully rational assumptions are quantitatively consistent with the observed diversification these results call for further efforts to integrate the models of rank dependent preferences in portfolio theory and asset pricing the decision theoretic literature has long acknowledged the shortcomings of the expected utility theory of von neumann and morgenstern 1944 several generalizations of the theory are inspired by the experimental evidence and aimed at improving its descriptive accuracy however there are few applications of new models of preferences in finance and expected utility continues to dominate the field 1 two principal hurdles slow the proliferation of novel preferences in financial economics first the lack of empirical non experimental or field data confirming that the behavior motivating non expected utilities is widespread outside the laboratory settings second the additional and often significant complexity of the alternative preferences which has not been shown to be critical in applications where the models based on expected utility fall short of reasonable predictions this article presents empirical and theoretical this paper was previously circulated under the title household portfolio diversification the paper has benefited from the comments of shlomo benartzi luca benzoni markus brunnermeier john dickhaut maria perozek raj singh hersh shefrin and workshop participants at minnesota finance bag lunch 2003 wharton conference household financial decision making and portfolio choice and 2003 summer meetings of econometric society i would like to thank cam harvey the editor and an anonymous referee for many helpful comments and suggestions a special thanks to jack kareken for comments and editorial help on an earlier draft i am grateful to donna zerwitz for editorial assistance the views expressed herein are those of the author and not necessarily of the federal reserve bank of minneapolis or the federal reserve system all errors and omissions are the sole responsibility of the author address correspondence to valery polkovnichenko finance 3 122 csom 319 19 th

redefining innovation eco innovation research and the contribution from ecological economics while innovation processes toward sustainable development eco innovations have received increasing attention during the past years theoretical and methodological approaches to analyze these processes are poorly developed against this background the term eco innovation is introduced in this paper addressing explicitly three kinds of changes towards sustainable development technological social and institutional innovation secondly the potential contribution of neoclassical and co evolutionary approaches from environmental and innovation economics to eco innovation research is discussed three peculiarities of eco innovation are identified the double externality problem the regulatory push pull effect and the increasing importance of social and institutional innovation while the first two are widely ignored in innovation economics the third is at the least not elaborated appropriately the consideration of these peculiarities may help to overcome market failure by establishing a specific eco innovation policy and to avoid a technology bias through a broader understanding of innovation finally perspectives for a specific contribution of ecological economics to eco innovation research are drawn it is argued that methodological pluralism as established in ecological economics would be very beneficial for eco innovation research a theoretical framework integrating elements from both neoclassical and evolutionary approaches should be pursued in order to consider the complexity of factors influencing innovation decisions as well as the specific role of regulatory instruments and the experience gathered in ecological economics integrating ecological social and economic aspects of sustainable development is highly useful for opening up innovation research to social and institutional changes 2000 elsevier science b v all rights reserved

driving effect of technology innovation on energy utilization efficiency in strategic emerging industries abstract under the policy of energy saving and emission reduction technological innovation has become the key power driver to improve energy utilization efficiency by using the panel data of 21 industrial segments between 2000 and 2015 this paper investigates the driving effect of technological innovation on energy utilization efficiency in strategic emerging industries and analyzes the critical factors influencing the driving effect of technological innovation by the stochastic frontier analysis method the empirical result shows that technological innovation between 2000 and 2015 has had a significant positive driving effect on the energy utilization efficiency of strategic emerging industries and exhibits a development trend of year by year steady state growth on the whole the greater the value of the development expenditure of new green products and the investment in environmental pollution treatment the greater the technological efficiency the greater the value of the transformation expenditure of energy saving technology the greater the technological inefficiency finally the paper proposes the countermeasures and suggestions for the driving effect of technological innovation on energy utilization efficiency in strategic emerging industries an empirical study is made to analyze the driving effect of technological innovation on energy utilization efficiency the positive and negative factors of technological innovation are forgotten strategic emerging industries can select optimal innovation behavior to improve quality and efficiency of energy utilization based on the results

theorizing change revisited an amended process model of institutional innovations and changes in institutional fields abstract the recent abandonment of old taxis and the introduction and diffusion of new taxis and car ride sharing services of uber and the sharing economy in general shows that institutional environments change this paper provides a review on institutional change based on 29 previously published case studies based on this review and the uber case an overview of antecedents for institutional change is developed furthermore an existing model describing the process of institutional change greenwood et al 2002 is validated and extended this extended process model describes the development and different phases of institutional change this paper aims to enrich our theoretical understanding of institutional change and to provide insights for change agents

the national system of innovation in historical perspective contrary to some recent work on so called globalisation this paper argues that national and regional systems of innovation remain an essential domain of economic analysis their importance derives from the networks of relationships which are necessary for any firm to innovate whilst external international connections are certainly of growing importance the influence of the national education system industrial relations technical and scientific institutions government policies cul tural traditions and many other national institutions is fundamental the historical examples of germany japan and the former ussr illustrate this point as well as the more recent contrast between east asian and latin american countries introduction the national system of friedrich list according to this author s recollections the first person to use the expression national system of innovation was bengt ake lundvall and he is also the editor of a highly original and thought provoking book 1992 on this subject however as he and his colleagues would be the first to agree and as lundvall himself points out the idea actually goes back at least to friedrich list s conception of the national system of political economy 1841 which might just as well have been called the national system of innovation the main concern of list was with the problem of germany overtaking england and for underdeveloped countries as germany then was in relation to england he advocated not only protection of infant industries but a broad range of policies designed to accelerate or to make possible industrialisation and economic growth most of these policies were concerned with learning about new technology and applying it the racialist and colonialist overtones of the book were in strong contrast to the inter nationalist cosmopolitan approach of the classical free trade economists and list s belief that holland and denmark should join the german bund and acquire german nationality because of their descent and whole character reads somewhat strangely in the european community of today nevertheless despite these unattractive features of his outlook he clearly anticipated many contemporary theories after reviewing the changing ideas of economists about development in the years since the second world war the world bank 1991 concludes that it is intangible investment in knowledge accumulation which is decisive rather than physical capital investment as was at one time believed pages 33 35 the report cites the new growth theory

effects of a mandatory local currency pricing law on the exchange rate pass through abstract this paper discusses whether law 28300 of 2004 that required peruvian firms to express their prices in peru s currency in a context of high price dollarization affected the exchange rate pass through erpt we hypothesize that the enactment of the law introduced menu costs for firms that used to set their prices in dollars prompting several of them to make a permanent switch to pricing in local currency using disaggregated consumer price index cpi data we find that following passage of the law the erpt was completely offset for non durable goods with dollarized prices and partially offset for durable goods with dollarized prices these effects may vary due to differences in imported component shares market power and markup pricing

sustainability oriented innovation system analyses of brazil russia india china south africa turkey and singapore abstract the coherency of research development and innovation processes are vital in promoting a more resource efficient society sustainability oriented innovation systems define specific kinds of innovation systems i e those that are directed to the aims of sustainable development this paper develops an integrated method with four layers of analysis to evaluate the priorities and performances of such systems the method is applied to a sample of emerging and innovation based economies namely brazil russia india china south africa turkey and singapore the analyses consider the 6 main activities or functional dynamics of innovation systems and a set of 19 keywords the keywords relate to the thematic clusters of renewable energy technologies energy efficiency and environmental management the priorities of the countries in each main interaction of the system are classified accordingly the priorities are compared to the existing level of specialization in the keywords based on the intermediate outputs of the system the analyses cover 153 838 papers and 15 138 patents between the years 2003 and 2014 a sustainable innovation index is developed to aggregate the normalized values of country performance across all keywords singapore receives the highest value 21 17 and the average of brazil russia india china and south africa is 14 91 the results determine the ability of countries to align priorities and performance towards more mature innovation systems for sustainable development

dyadic compromise effect existing research on the compromise effect has focused exclusively on the individual this paper investigates compromise effects in a setting that involves multiple individuals making a choice we study whether the dyadic compromise effect dce exists the association between dyadic and individual compromise effects and strategies to mitigate the dce we build a statistical model of dyadic choice that formally incorporates dce we conduct two studies to test our proposed models empirically in study 1 we begin with an investigation of the dce with student subjects in study 2 we test for the presence of dce among married couples when making retirement investment choices in both studies model free and model based evidence provides strong support for the presence of dce a model that incorporates dce provides a better fit than models that do not evidence in support of dce is shown to be robust to alternative compromise effect model specifications and utility aggregation methods we find that the indi

perspectives from the president s commission on social security reform recently we were asked to serve on the president s commission to strengthen social security csss along with 14 other members drawn equally from both major political parties the commission s charge was to provide recommendations to modernize the social security system restore its fiscal soundness and develop a workable system of personal retirement accounts this paper explains how the commission arrived at some of its recommendations and the role that economics played in contributing to these recommendations we describe the key institutional constraints confronting efforts to reform social security and how these constraints influenced commission decisions we also illustrate how economics research influenced the commission s analysis of how to structure personal accounts ways to enhance traditional social security program finances and means of measuring the extent of financial progress achieved through reform

offering versus choice in 401 k plans equity exposure and number of funds records of over half a million participants in more than 600 401 k plans indicate that participants tend to allocate their contributions evenly across the funds they use with the tendency weakening with the number of funds used the number of funds used typically between three and four is not sensitive to the number of funds offered by the plans which ranges from 4 to 59 a participant s propensity to allocate contributions to equity funds is not very sensitive to the fraction of equity funds among offered funds the paper also comments on limitations on inferences from experiments and aggregate level data analysis how much and how to save for retirement is one of the most important financial decisions made by most people defined contribution dc pension plans such as the popular 401 k plans are important instruments of such savings by 2001 year end about 45 million american employees held 401 k plan accounts with a total of 1 75 trillion in assets holden and vanderhei 2001 an important characteristic of these plans is that the participant has responsibility over his savings among a plan s various funds how responsibly do the participants behave in particular how sensitive are participants choices to possible framing effects associated with the menu of choices they are offered to explore these questions this paper analyzes a data set recently provided by the vanguard group consisting of records of more than half a million participants in about 640 dc plans these plans offer between 4 and 59 funds in which participants can invest all plans offer at least one stock fund 635 plans

borrowing on the wrong credit card evidence from mexico abstract we establish new facts about the way consumers allocate debt among their credit cards using data for a representative sample of cardholders in mexico we find that relative prices are weak predictors of the allocation of debt purchases and payments consumers allocate a large fraction of their debt to high interest cards incurring a cost of 31 percent above the minimum using an experiment we find that consumers do not substitute in the price margin although they respond to salient temporary low interest offers we conclude that limited attention and mental accounting best rationalize our results and discuss implications for the market jel d14 g21 o12 o16

a tale of two market failures technology and environmental policy abstract market failures associated with environmental pollution interact with market failures associated with the innovation and diffusion of new technologies these combined market failures provide a strong rationale for a portfolio of public policies that foster emissions reduction as well as the development and adoption of environmentally beneficial technology both theory and empirical evidence suggest that the rate and direction of technological advance is influenced by market and regulatory incentives and can be cost effectively harnessed through the use of economic incentive based policy in the presence of weak or nonexistent environmental policies investments in the development and diffusion of new environmentally beneficial technologies are very likely to be less than would be socially desirable positive knowledge and adoption spillovers and information problems can further weaken innovation incentives while environmental technology policy is fraught with difficulties a long term view suggests a strategy of experimenting with policy approaches and systematically evaluating their success

wealth information acquisition and portfolio choice i solve with an approximation a grossman stiglitz economy under general preferences thus allowing for wealth effects because information generates increasing returns decreasing absolute risk aversion in conjunction with the availability of costly information is sufficient to explain why wealthier households invest a larger fraction of their wealth in risky assets one no longer needs to resort to decreasing relative risk aversion an empirically questionable assumption furthermore i show how to distinguish empirically between these two explanations finally i find that the availability of costly information exacerbates wealth inequalities copyright 2004 oxford university press

portfolios in the ibex 35 before and after the global financial crisis abstractin this article we present an analysis of the effectiveness of various portfolio optimization strategies applied to the stocks included in the spanish ibex 35 index for a period of 14 years from 2001 until 2014 the period under study includes episodes of volatility and instability in financial markets incorporating the global financial crisis and the european sovereign debt crisis this implies a challenge in portfolio optimization strategies since the methodologies are restricted to the assignment of positive weights we have taken for asset allocation the daily returns with an estimation window equal to 1 year and we hold portfolio assets for another year this article attempts to influence the discussion over whether the naive diversification proves to be an effective strategy as opposed to portfolio optimization models for that we evaluate the out of sample performance of 15 strategies for asset allocation in the ibex 35 before and after of the global financial crisis our results sugg

international technology oriented agreements to address climate change much discussion has surrounded possible alternatives for international agreements on climate change particularly post 2012 among these alternatives technology oriented agreements toas are perhaps the least well defined we explore what toas may consist of why they might be sensible which toas already exist in international energy and environmental governance and whether they could make a valuable contribution to addressing climate change we find that toas aimed at knowledge sharing and coordination research development or demonstration could increase the overall efficiency and effectiveness of international climate cooperation but are likely to have limited environmental effectiveness on their own technology transfer agreements are likely to have similar properties unless the level of resources expended is large in which case they could be environmentally significant technology specific mandates or incentives could be environmentally effective within the applicable sector but are more likely to make a cost effective contribution when viewed as a complement to rather than a substitute for flexible emissions based policies these results indicate that toas could potentially provide a valuable contribution to the global response to climate change the success of specific toas will depend on their design implementation and the role they are expected to play relative to other components of the policy portfolio

optimal defaults and active decisions defaults often have a large influence on consumer decisions we identify an overlooked but practical alternative to defaults requiring individuals to make an explicit choice for themselves we study such active decisions in the context of 401 k saving we find that compelling new hires to make active decisions about 401 k enrollment raises the initial fraction that enroll by 28 percentage points relative to a standard opt in enrollment procedure producing a savings distribution three months after hire that would take 30 months to achieve under standard enrollment we also present a model of 401 k enrollment and derive conditions under which the optimal enrollment regime is automatic enrollment i e default enrollment standard enrollment i e default non enrollment or active decisions i e no default and compulsory choice active decisions are optimal when consumers have a strong propensity to procrastinate and savings preferences are highly heterogeneous financial illiteracy however favors default enrollment over active decision enrollment

uk innovation systems for new and renewable energy technologies drivers barriers and systems failures abstract a better understanding of the systemic processes by which innovation occurs is useful both conceptually and to inform policy making in support of innovation in more sustainable technologies this paper analyses current innovation systems in the uk for a range of new and renewable energy technologies and generates policy recommendations for improving the effectiveness of these innovation systems although incentives are in place in the uk to encourage innovation in these technologies system failures or gaps are identified in moving technologies along the innovation chain preventing their successful commercialisation sustained investment will be needed for these technologies to achieve their potential it is argued that a stable and consistent policy framework is required to help create the conditions for this in particular such a framework should be aimed at improving risk reward ratios for demonstration and pre commercial stage technologies this would enhance positive expectations stimulate learning effects leading to cost reductions and increase the likelihood of successful commercialisation