Zhou, Guofu. Small Sample Tests of Portfolio Efficiency. Journal of Financial Economics, 1991, 30 (1): 165-191.

Ennis, Richard M., and Paul Burik. The Influence of Non-Risk Factors on Real Estate Holdings of Pension Funds. Financial Analysts Journal, 1991, 47 (6): 44-55.

Shanthikumar, J. George, and David D. Yao. Bivariate characterization of some stochastic order relations. Advances in Applied Probability, 1991, 23 (3): 642-659.

Ross, K.W., and D.D. Yao. Optimal load balancing and scheduling in a distributed computer system. Journal of the Acm, 1991, 38 (3): 676-689.

Glasserman, Paul, and David D. Yao. Algebraic structure of some stochastic discrete event systems, with applications. Discrete Event Dynamic Systems-Theory and Applications, 1991, 1 (1): 7-35.

Ennis, Richard M., and Paul Burik. Pension Fund Real Estate Investment under a Simple Equilibrium Pricing Model. Financial Analysts Journal, 1991, 47 (3): 20-30.

Hansen, Lars Peter, and Ravi Jagannathan. Implications of Security Market Data for Models of Dynamic Economies. Journal of Political Economy, 1991, 99 (2): 225-262.

Chang, Cheng-Shang, Xiuli Chao, and Michael Pinedo. Monotonicity results for queues with doubly stochastic Poisson arrivals: Ross's conjecture. Advances in Applied Probability, 1991, 23 (1): 210-228.

Shanthikumar, J. George, and David D. Yao. Strong Stochastic Convexity: Closure Properties and Applications. Journal of Applied Probability, 1991, 28 (1): 131-145.

Chen, Hong,and A. Mandelbaum. Discrete Flow Networks: Bottleneck Analysis and Fluid Approximations. Mathematics of Operations Research, 1991, 16 (2): 408-446.