Migration Build Methods

The property BuildMethod specifies the method that is used to build a complete migration curve from a finite set of migration intensities. The table below gives the BuildMethods currently supported

BuildMethod	Description
CONSTANT_INTENSITY	Between age nodes the migration intensity is constant
HYBRID_INTENSITY	Between age nodes the migration intensity is a quadratic function of age.
ROGERS_CASTRO	Fit migration probabilities using 13-parameter exponential model of Rogers and Castro.
ROGERS_CASTRO_WILSON	Fit migration probabilities using Wilson's modification of the Rogers-Castro model to include a student peak.
SMOOTHED_ASMP	Build the curve using HYBRID_INTENSITY then smooth migration probabilities using P-Splines.
TOPALS	Build a curve using TOPALS regression
BSPLINE_ASMP	A special case of SMOOTHED_ASMP where the smoothing penalty is set to zero.
KERNEL_REGRESSION	Build the curve using HYBRID_INTENSITY then smooth migration probabilities using local polynomial regression.
PTOPALS	Build the curve using TOPALS with P-Splines.

For migration objects with a MigrationRatios subtable MultiTransBuildMethods build complete destination-specific migration curves from a finite set of migration ratios.