Uncertainty Estimation for Pseudo‐Bayesian Inference Under Complex Sampling

Social and economic studies are often implemented as complex survey designs. For example, multistage, unequal probability sampling designs utilised by federal statistical agencies are typically constructed to maximise the efficiency of the target domain level estimator (e.g. indexed by geographic area) within cost constraints for survey administration. Such designs may induce dependence between the sampled units; for example, with employment of a sampling step that selects geographically indexed clusters of units. A sampling‐weighted pseudo‐posterior distribution may be used to estimate the population model on the observed sample. The dependence induced between coclustered units inflates the scale of the resulting pseudo‐posterior covariance matrix that has been shown to induce under coverage of the credibility sets. By bridging results across Bayesian model misspecification and survey sampling, we demonstrate that the scale and shape of the asymptotic distributions are different between each of the pseudo‐maximum likelihood estimate (MLE), the pseudo‐posterior and the MLE under simple random sampling. Through insights from survey‐sampling variance estimation and recent advances in computational methods, we devise a correction applied as a simple and fast postprocessing step to Markov chain Monte Carlo draws of the pseudo‐posterior distribution. This adjustment projects the pseudo‐posterior covariance matrix such that the nominal coverage is approximately achieved. We make an application to the National Survey on Drug Use and Health as a motivating example and we demonstrate the efficacy of our scale and shape projection procedure on synthetic data on several common archetypes of survey designs.     

The effect of disability income on retirement decisions and wealth

Using the 2008 National Longitudinal Survey of Youth, this study examines the impact of receiving disability income on a respondent’s decision to calculate a retirement income need, use tax-advantaged accounts and accumulate retirement wealth. Respondents who received disability income were 4.4% less likely to report calculating a retirement income need and 4.5% less likely to report using a tax-advantaged account, compared to a reference group of respondents who did not receive disability income. Respondents who received disability income also accumulated 41% less retirement wealth compared to the same reference group.     

Recalibrating the reported returns to agricultural R&D: what if we all heeded Griliches?*

Zvi Griliches’ seminal analysis of hybrid corn spawned a large literature seeking to quantify and demonstrate the value of agricultural research and development (R&D) investments. The most important metric for quantifying the rate of return to R&D emerging from this literature is the internal rate of return (IRR), even though Griliches was sceptical of its usefulness as a metric in this context. An alternative metric, also reported by Griliches but not as commonly used in the subsequent returns‐to‐research literature, is the benefit–cost ratio (BCR). We assess how the implications of the returns to agricultural R&D literature may have differed if the BCR had become the standard rather than the IRR. We reveal that the IRR and BCR produce substantially different rankings of agricultural R&D projects, differences that persist even under various commodity and geographical aggregations of the BCR and IRR estimates. The median across 2,627 reported IRRs is 37.5 per cent per year. Using data gleaned from 492 research evaluation studies, we developed and deployed a methodology to impute 2,126 BCRs (median of 5.4) and modified internal rates of returns (MIRRs, median of 16.4 per cent per year) assuming a uniform 10 per cent per year discount rate and a 30 year research timeline.     

The informativeness of pro forma and street earnings: an examination of information asymmetry around earnings announcements

Using adverse-selection cost as a proxy for information asymmetry, we find evidence that non-GAAP earnings numbers issued by management (pro forma earnings) and analysts (street earnings) improve price discovery. First, information asymmetry before an earnings announcement is positively associated with the probability of a non-GAAP earnings number at the forthcoming earnings announcement. Second, the post-announcement reduction in information asymmetry is greater when managers or analysts issue non-GAAP earnings at the earnings announcement and when the magnitude of the non-GAAP earnings adjustment is larger. Our results suggest that earnings adjustments by analysts and managers increase the amount and precision of earnings information and help to narrow information asymmetry between informed and uninformed traders following earnings announcements. Alternatively, the findings may be attributable to characteristics of non-GAAP firms and overall better reporting quality for those firms rather than non-GAAP earnings disclosure per se.     

Do retirement planning strategies alter the effect of time preference on retirement wealth?

An individual’s willingness to accumulate retirement wealth is influenced by their preference for intertemporal consumption. People with a strong preference for current consumption (high personal discount rate) may choose to save less and face the risk of decreased retirement preparedness. A negative relation between a high personal discount rate and retirement wealth may be reduced when individuals engage in some form of retirement planning. Using the National Longitudinal Survey of Youth, we provide evidence that respondents with a high personal discount rate accumulated 37% less retirement wealth, on average, between 2004 and 2008, when compared with respondents with a low personal discount rate. However, when retirement planning strategies were included in the model, there was no statistical difference in retirement wealth between people with high and low personal discount rates. The retirement planning strategies included calculating a retirement income need, hiring a financial planner for retirement or engaging in both of these activities.     

Risk and the Value of Bt Corn

A conceptual model is developed to evaluate the effect of Bt corn on risk. Results highlight the importance of distinguishing between marginal and aggregate risk effects and demonstrate that the effect of Bt corn on risk depends crucially on the price paid for the technology. Empirical results show that, depending on the price, Bt corn can be marginally risk increasing or decreasing and can either increase or decrease corn acreage. Also, depending on the price, Bt corn can provide a risk benefit to farmers, even when Bt corn is risk increasing.     

Is the Aggregate Investor Reluctant to Realise Losses? Evidence from Taiwan

We ask whether the typical investor and the aggregate investor exhibit a bias known as the disposition effect, the tendency to sell investments that are held for a profit at a faster rate than investments held for a loss. We analyse all trading activity on the Taiwan Stock Exchange (TSE) for the five years ending in 1999. Using a dataset that contains all trades (over one billion) and the identity of every trader (nearly four million), we find that in aggregate, investors in Taiwan are about twice as likely to sell a stock if they are holding that stock for a gain rather than a loss. Eighty‐four percent of all Taiwanese investors sell winners at a faster rate than losers. Individuals, corporations, and dealers are reluctant to realise losses, while mutual funds and foreigners, who together account for less than 5% of all trades (by value), are not.     

Disclosure of outsourcing in the annual report: Causes and market returns effects

Firms increasingly are utilizing outsourcing to enhance or maintain their competitiveness. Prior research shows that capital markets value a firm's decision to outsource. This study uses a sample of firms announcing outsourcing arrangements in a press release to examine which factors are associated with the subsequent decision to voluntarily provide or withhold information about outsourcing in their annual report. The paper also examines whether annual report disclosure is a reliable signal of future market performance. We find that underperforming firms, larger firms, and firms experiencing negative outsourcing announcement market returns and negative long-term market returns are more likely to disclose outsourcing in their annual reports. There is also evidence that firms' disclosure of outsourcing in the annual report signals an improvement in market performance that is credible to the capital markets. We contend that the disclosure and subsequent firm performance issues we investigate apply to any type of outsourcing arrangement, and therefore our results are relevant to future information systems research on this subject. Our findings also suggest that regulatory standards could reduce private information search costs for investors by providing a common disclosure methodology for outsourcing activities.