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How does the DerSimonian and Laird procedure for random effects meta-analysis compare with its more efficient but harder to compute counterparts? (2010)
Journal Article
random effects meta-analysis compare with its more efficient but harder to compute counterparts?. Journal of Statistical Planning and Inference, 140(4), 961-970. https://doi.org/10.1016/j.jspi.2009.09.017

The procedure suggested by DerSimonian and Laird is the simplest and most commonly used method for fitting the random effects model for meta-analysis. Here it is shown that, unless all studies are of similar size, this is inefficient when estimating... Read More about How does the DerSimonian and Laird procedure for random effects meta-analysis compare with its more efficient but harder to compute counterparts?.

Inference for meta-analysis with a suspected temporal trend (2010)
Journal Article
Baker, R., & Jackson, D. (2010). Inference for meta-analysis with a suspected temporal trend. Biometrical Journal, 52(4), 538-551. https://doi.org/10.1002/bimj.200900307

There is sometimes a clear evidence of a strong secular trend in the treatment effect of studies included in a meta-analysis. In such cases, estimating the present-day treatment effect by meta-regression is both reasonable and straightforward. We how... Read More about Inference for meta-analysis with a suspected temporal trend.

Risk aversion in maintenance: a utility-based approach (2010)
Journal Article
Baker, R. (2010). Risk aversion in maintenance: a utility-based approach. IMA Journal of Management Mathematics, 21(4), 319-332. https://doi.org/10.1093/imaman/dpn013

In the author's concept of risk-averse maintenance, introduced in a previous paper, we seek to minimize the disutility of cost per unit time rather than to minimize cost per unit time itself. This gives a maintenance policy that is optimal under risk... Read More about Risk aversion in maintenance: a utility-based approach.

The health impact of an online heart disease support group: A comparison of moderated vs. unmoderated support (2009)
Journal Article
group: A comparison of moderated vs. unmoderated support. Health Education Research, 24(4), 646-654. https://doi.org/10.1093/her/cyp001

The aim of this study was to assess whether our online closed community heart care support group and information resource could sustain changes in health behaviour after the moderators withdrew their support. Heart patients (n 5 108) living in a... Read More about The health impact of an online heart disease support group: A comparison of moderated vs. unmoderated support.

Enabling healthy choices: Is ICT the highway to health improvement? (2008)
Journal Article
Lindsay, S., Bellaby, P., Smith, S., & Baker, R. (2008). Enabling healthy choices: Is ICT the highway to health improvement?. Health, 12(3), 313-331. https://doi.org/10.1177/1363459308090051

The White Paper Choosing health acknowledges that there is no lack of information in the system about healthy lifestyles, but the manner of communication of risk and the level of support for lifestyle change need improvement. Action also has to be ta... Read More about Enabling healthy choices: Is ICT the highway to health improvement?.

An order-statistics-based method for constructing multivariate distributions with fixed marginals (2008)
Journal Article
Baker, R. (2008). An order-statistics-based method for constructing multivariate distributions with fixed marginals. Journal of Multivariate Analysis, 99(10), 2312-2327. https://doi.org/10.1016/j.jmva.2008.02.019

A new system of multivariate distributions with fixed marginal distributions is introduced via the consideration of random variates that are randomly chosen pairs of order statistics of the marginal distributions. The distributions allow arbitrary po... Read More about An order-statistics-based method for constructing multivariate distributions with fixed marginals.

Probabilistic applications of the Schlomilch transformation (2008)
Journal Article
Baker, R. (2008). Probabilistic applications of the Schlomilch transformation. Communications in Statistics - Theory and Methods, 37(14), 2162-2176. https://doi.org/10.1080/03610920801892014

The Schlömilch transformation, long used by mathematicians for integral evaluation, allows probability mass to be redistributed, thus transforming old distributions to new ones. The transformation is used to introduce some new families of distributio... Read More about Probabilistic applications of the Schlomilch transformation.

A new approach to outliers in meta-analysis (2008)
Journal Article
Baker, R., & Jackson, D. (2008). A new approach to outliers in meta-analysis. Health Care Management Science, 11(2), 121-131. https://doi.org/10.1007/s10729-007-9041-8

The synthesis of evidence from trials and medical studies using meta-analysis is essential for Evidence Based Medicine. However, problematical outlying results often occur even under the random-effects model. We propose a model that allows a long-tai... Read More about A new approach to outliers in meta-analysis.

Predicting stock returns and assessing prediction performance (2007)
Journal Article
Baker, R., & Belgorodski, A. (2007). Predicting stock returns and assessing prediction performance. IMA Journal of Management Mathematics, 18(4), 413-433. https://doi.org/10.1093/imaman/dpm023

We use regression methods to predict the expected monthly return on stocks and the covariance matrix of returns, the predictor variables being a company's ‘fundamentals’, such as dividend yield and the history of previous returns. Predictions are eva... Read More about Predicting stock returns and assessing prediction performance.

Statistical aspects of the portfolio construction programme (2007)
Thesis
Belgorodski, A. Statistical aspects of the portfolio construction programme. (Thesis). Salford : University of Salford

The area of finance poses many challenging problems to the decision maker. One of them is the modelling of the expected return on stocks and the covariance matrix of returns. This thesis approaches the decision problem of choosing an optimum portfo... Read More about Statistical aspects of the portfolio construction programme.

Using journal impact factors to correct for the publication bias of medical studies (2006)
Journal Article
Baker, R., & Jackson, D. (2006). Using journal impact factors to correct for the publication bias of medical studies. Biometrics, 62(3), 785-792. https://doi.org/10.1111/j.1541-0420.2005.00513.x

Publication bias of the results of medical studies can invalidate evidence-based medicine. The existing methodology for modeling this essentially relies upon the symmetry of the funnel plot. We present a new method of modeling publication bias that u... Read More about Using journal impact factors to correct for the publication bias of medical studies.

Predicting the outcomes of annual sporting contests (2006)
Journal Article
Baker, R., & Scarf, P. (2006). Predicting the outcomes of annual sporting contests. Journal of the Royal Statistical Society: Series C, 55(2), 225-239. https://doi.org/10.1111/j.1467-9876.2006.00525.x

Data from 20 sporting contests in which the same two teams compete regularly are studied. Strong and weak symmetry requirements for possible models are identified, and some simple models are proposed and fitted to the data. The need to compute the ex... Read More about Predicting the outcomes of annual sporting contests.

Risk aversion in maintenance : overmaintenance and the principal-agent problem (2005)
Journal Article
Baker, R. (2005). Risk aversion in maintenance : overmaintenance and the principal-agent problem. IMA Journal of Management Mathematics, 17(2), 99-113. https://doi.org/10.1093/imaman/dpi028

The concept of a risk-averse maintenance policy is introduced, and two approaches to modelling it are discussed, the first being via utility functions, and the second via inflation of the costs of unscheduled failures. After introducing a general met... Read More about Risk aversion in maintenance : overmaintenance and the principal-agent problem.

Capital investment appraisal: a new risk premium model (2003)
Journal Article
Fox, R., & Baker, R. (2003). Capital investment appraisal: a new risk premium model. International Transactions in Operational Research, 10(2), 115-126. https://doi.org/10.1111/1475-3995.00398

Net Present Value (NPV) is the principal valuation model of the financial literature. Firms are accordingly directed, as a matter of good practice, to adopt the model for selecting investment projects, yet questionnaire surveys show that the adoption... Read More about Capital investment appraisal: a new risk premium model.

Can models fitted to small data samples lead to maintenance policies with near-optimum cost? (1995)
Journal Article
Baker, R., & Scarf, P. (1995). Can models fitted to small data samples lead to maintenance policies with near-optimum cost?. IMA Journal of Management Mathematics, 6(1), 3-12. https://doi.org/10.1093/imaman/6.1.3

In a general context of maintenance modelling, the excess cost of operating at the estimated optimum value of some decision variable (as opposed to the true unknown optimum) is related to the sample size of the dataset available for modelling. Alth... Read More about Can models fitted to small data samples lead to maintenance policies with near-optimum cost?.

Multi-period market risk estimation and performance evaluation : evidence from univariate, multi-variate and options data
Thesis
Iqbal, R. (in press). Multi-period market risk estimation and performance evaluation : evidence from univariate, multi-variate and options data. (Thesis). University of Salford

There are different risk management approaches available, as different firms have different risk goals. Value at risk (VaR) is the most frequently used risk measure for asset or portfolio risk and certainly, per the Basel framework, is a preferred me... Read More about Multi-period market risk estimation and performance evaluation : evidence from univariate, multi-variate and options data.