The model for human population dynamics as a part of the global biosphere model: some aspects of modeling in a dialogue regime

"A matrix model for an age structured population with 4 groups is presented....The demography matrix is identified with data from global demographic statistics for the 1970s. When calibrating the matrix elements, a semi-formal procedure was used to calculate the dominant eigenvalue and corresponding eigenvector. This procedure was based essentially on the dialogue mode of computation provided by the programing language APL." The advantages of using APL are discussed