Provides the Rogers-Castro schedule,

* M(x) = a_{1} \exp[-α_{1}x] + a_{2} \exp [ α_{2}(x-μ_{2})- \exp [ λ_{2}(x-μ_{2}) ] ] +c*

for a given set of parameters and ages.

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`x` |
A vector of numbers |

`param` |
A list with names match those of the schedule |

`scaled` |
Scale estimates to sum to one across all ages, x. |

Returns the M(x) values from the Rogers-Castro schedule of age specific migration rate. The age range for the calculation can take any sequence of positive numbers, such as ages in single or 5-year intervals. The `param`

argument must be a list with correct names for each parameter. See for example the `rc9.fund`

object for an example of the naming convention.

Vector of values of M(x)

Guy J. Abel

Rogers, A., and L. J. Castro. (1981). Model Migration Schedules. *IIASA Research Report 81* RR-81-30

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