NUDGE: IMPROVING DECISIONS ABOUT HEALTH, WEALTH, AND HAPPINESS by Richard H. Thaler and Cass R. Sunstein Penguin Books, 2009, 312 pp, ISBN 978-0-14-311526-7This book is best described formally as a general explanation of and advocacy for libertarian paternalism, a term coined by the authors in earlier publications. Informally, it is about how leaders, systems, organizations, and governments can nudge people to do the things the nudgers want and need done for the betterment of the nudgees, or of society. It is paternalism in the sense that "it is legitimate for choice architects to try to influence people's behavior in order to make their lives longer, healthier, and better", (p. 5) It is libertarian in that "people should be free to do what they like - and to opt out of undesirable arrangements if they want to do so", (p. 5) The built-in possibility of opting out or making a different choice preserves freedom of choice even though people's behavior has been influenced by the nature of the presentation of the information or by the structure of the decisionmaking system. I had never heard of libertarian paternalism before reading this book, and I now find it fascinating.Written for a general audience, this book contains mostly social and behavioral science theory and models, but there is considerable discussion of structure and process that has roots in mathematical and quantitative modeling. One of the main applications of this social system is economic choice in investing, selecting and purchasing products and services, systems of taxes, banking (mortgages, borrowing, savings), and retirement systems. Other quantitative social choice systems discussed include environmental effects, health care plans, gambling, and organ donations. Softer issues that are also subject to a nudge-based approach are marriage, education, eating, drinking, smoking, influence, spread of information, and politics. There is something in this book for everyone.The basis for this libertarian paternalism concept is in the social theory called "science of choice", the study of the design and implementation of influence systems on various kinds of people. The terms Econs and Humans, are used to refer to people with either considerable or little rational decision-making talent, respectively. The various libertarian paternalism concepts and systems presented are tested and compared in light of these two types of people. Two foundational issues that this book has in common with another book, Network of Echoes: Imitation, Innovation and Invisible Leaders, that was also reviewed for this issue of the Journal are that 1 ) there are two modes of thinking (or components of the brain) - an automatic (intuitive) process and a reflective (rational) process and 2) the need for conformity and the desire for imitation are powerful forces in human behavior. …

Nudge: Improving Decisions about Health, Wealth, and Happiness

行銷硏究 : Marketing research

25. Multiple Imputation for Nonresponse in Surveys. By D. B. Rubin. ISBN 0 471 08705 X. Wiley, Chichester, 1987. 258 pp. £30.25.

Multiple Imputation for Nonresponse in Surveys

We investigate conditions sufficient for identification of average treatment effects using instrumental variables. First we show that the existence of valid instruments is not sufficient to identify any meaningful average treatment effect. We then establish that the combination of an instrument and a condition on the relation between the instrument and the participation status is sufficient for identification of a local average treatment effect for those who can be induced to change their participation status by changing the value of the instrument. Finally we derive the probability limit of the standard IV estimator under these conditions. It is seen to be a weighted average of local average treatment effects.

Evolution and Rationality Some Recent Game-Theoretic Results. Identification and Estimation of Local Average Treatment Effects

This paper undertakes an assessment of a rapidly growing body of economic research on financial literacy. We start with an overview of theoretical research which casts financial knowledge as a form of investment in human capital. Endogenizing financial knowledge has important implications for welfare as well as policies intended to enhance levels of financial knowledge in the larger population. Next, we draw on recent surveys to establish how much (or how little) people know and identify the least financially savvy population subgroups. This is followed by an examination of the impact of financial literacy on economic decision-making in the United States and elsewhere. While the literature is still young, conclusions may be drawn about the effects and consequences of financial illiteracy and what works to remedy these gaps. A final section offers thoughts on what remains to be learned if researchers are to better inform theoretical and empirical models as well as public policy.

/pdf/the-economic-importance-of-financial-literacy-theory-and-17mb1g4cfb.pdf

The Economic Importance of Financial Literacy: Theory and Evidence

In this article, I estimate Euler equations—that is, the first-order conditions of the consumers' maximization problem—using data from two data sets. Consumption data are taken from the Consumer Expenditure Survey. Income data are taken from the Panel Study of Income Dynamics. Because the data for the estimation come from two samples, I use a generalization of the instrumental variables estimator—the two-sample instrumental variables estimator. I find evidence that consumption is excessively sensitive to predictable income growth. The estimates of the coefficient of excess sensitivity for three consumption measures range from .2 to .5.

Permanent Income, Current Income, and Consumption: Evidence From Two Panel Data Sets

We document strikingly similar gender differences in financial literacy across countries. When asked to answer questions that measure knowledge of basic financial concepts, women are less likely than men to answer correctly and more likely to indicate that they do not know the answer. In addition, women give themselves lower scores on financial literacy self-assessments than men. Both young and old women show low levels of financial literacy. Moreover, women for whom financial knowledge is likely to be very important—for example widows or single women—know little about concepts relevant for day-to-day financial decisions. Even women in favorable economic conditions are less financially knowledgeable than men. This is important because financial literacy has been linked to economic behavior, including retirement planning and wealth accumulation. Women live longer than men and are likely to spend time in widowhood. As a result, improving women’s financial literacy is key to helping them prepare for retirement and promoting their financial security.

/pdf/how-financially-literate-are-women-an-overview-and-new-54eei0oc18.pdf

How financially literate are women? An overview and new insights

In this paper, I examine the financial situation of older households. In addition, I examine whether employers’ initiatives to reduce planning costs via retirement seminars have an effect on workers’ saving. Using data from the Health and Retirement Study, I first show that many families arrive close to retirement with little or no wealth. Portfolios are also rather simple, and many families, particularly those with low education, hold little or no high-return assets. I further show that seminars foster saving. This is particularly the case for those with low education and those who save little. By offering financial education, both financial and total net worth increase sharply, particularly for families at the bottom of the wealth distribution and those with low education. Retirement seminars also increase total wealth (inclusive of pension and Social Security) for both high and low education families. Taken together, this evidence suggests that retirement seminars can foster wealth accumulation and bolster financial security in retirement.

/pdf/saving-and-the-effectiveness-of-financial-education-26pryctl68.pdf

Saving and the Effectiveness of Financial Education

Precautionary saving and subjective earnings variance

We analyze a national sample of Americans with respect to their debt literacy, financial experiences, and their judgments about the extent of their indebtedness. Debt literacy is measured by questions testing knowledge of fundamental concepts related to debt and by self-assessed financial knowledge. Financial experiences are the participants' reported experiences with traditional borrowing, alternative borrowing, and investing activities. Overindebtedness is a self-reported measure. Overall, we find that debt literacy is low: only about one-third of the population seems to comprehend interest compounding or the workings of credit cards. Even after controlling for demographics, we find a strong relationship between debt literacy and both financial experiences and debt loads. Specifically, individuals with lower levels of debt literacy tend to transact in high-cost manners, incurring higher fees and using high-cost borrowing. In applying our results to credit cards, we estimate that as much as one-third of the charges and fees paid by less knowledgeable individuals can be attributed to ignorance. The less knowledgeable also report that their debt loads are excessive or that they are unable to judge their debt position.

Annamaria Lusardi

Papers

Permanent Income, Current Income, and Consumption: Evidence From Two Panel Data Sets

How financially literate are women? An overview and new insights

Saving and the Effectiveness of Financial Education

Precautionary saving and subjective earnings variance

Debt Literacy, Financial Experiences, and Overindebtedness