3 key publications

• Koopman, S.J. (1993). Disturbance smoother for state space models Biometrika, 80(1):117--126.

• 

  Perotti, E. and Spier, K. (1993). Capital structure as a bargaining tool : the role of leverage in contract renegotiation American Economic Review, 83(5):1131--1141.

• 

  Harvey, A. and Koopman, S.J. (1993). Forecasting hourly electricity demand using time–varying splines Journal of the American Statistical Association, 88(424):1228--1236.