CalcAgeMaxFert {paramDemo}

Calculating Age at Maximum Fertility and Maximum Fertility.

Description

CalcAgeMaxFert is used to calculate the age at maximum fertility, and the maximum fertility level from parametric models of fertility.

Usage

CalcAgeMaxFert (beta, modelFert = "quadratic", ageMatur = 0, 
                           maxAge = 100)

Arguments

beta

Numerical vector of age-specific fertility parameters (see details).

modelFert

Age-specific fertility model. Options are “quadratic” (default), “PeristeraKostaki”, “ColcheroMuller”, “Hadwiger”, “gamma”, “beta”, “skewNormal”, “gammaMixture”, “HadwigerMixture”, “skewSymmetric”, “skewLogistic” (see details)

ageMatur

Numerical value for the age at sexual maturity.

maxAge

Numerical value for the maximum possible age of reproduction.

Details

For a given function g of age-specific fertility, CalcAgeMaxFert uses either an analytical solution to

\frac{dg}{dx} = 0

or a numerical approximation. For details of the parametric models available see CalcFert.

Value

The function outputs a vector with the calculated or estimated age at maximum fertility, the maximum level of fertility, the error in the estimation and the number of iterations (for numerical approximations), and the age at maturity as specified by the user.

Author(s)

Fernando Colchero [e-mail]

See Also

CalcSurv to calculate age-specific survival, CalcMort to calculate age-specific mortality, CalcFert to calculate age-specific fertility.

CalcAgeingRateMort to calculate ageing rates from parametric models of age-specific mortality. CalcRemainLifeExp to calculate remaining life expectancy from parametric models of age-specific mortality.

Examples

# Calculate age at maximum fertility from quadratic model:
maxg <- CalcAgeMaxFert(beta = c(b0 = 0.5, b1 = 0.01, b2 = 10))

# Calculate age at maximum fertility from gamma model:
maxg <- CalcAgeMaxFert(beta = c(b0 = 13, b1 = 2, b2 = 0.15),
                     modelFert = "gamma")