It is important to note that the model predicts that both R and F increase at the same rate of , and therefore predicts that they maintain the same ratio of R to F over time; that is, that they maintain a stable age structure. A quirk of this model is that it produces oscillations from year to year (Fig. 4.3). The yearly increase by V5 (X) therefore needs to be viewed over a 2-year period; for example, from years 4 to 6 the rosette numbers increase 5-fold from 500 to 2500, equivalent to two yearly increases x
We can quantify the eigenvector and therefore determine the ratio of R to F as follows, using equation 4.13:
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