Tools for the evaluation of interim analysis plans for sequentially
 monitored trials on a survival endpoint; tools to construct efficacy and 
 futility boundaries, for deriving power of a sequential design at a specified
 alternative, template for evaluating the performance of candidate plans at a 
 set of time varying alternatives. See Izmirlian, G. (2014) <doi:10.4310/SII.2014.v7.n1.a4>.

Statistical power simulation for testing the Rasch Model based on a three-way analysis of variance design with mixed classification.

The 'pwrss' R package provides flexible and comprehensive functions for
  statistical power and minimum required sample size calculations across a wide
  range of commonly used hypothesis tests in psychological, biomedical, and
  social sciences.

Conduct dsep tests (piecewise SEM) of a directed, or mixed, acyclic graph 
    without latent variables (but possibly with implicitly marginalized or
    conditioned latent variables that create dependent errors) based on
    linear, generalized linear, or additive modelswith or without a
    nesting structure for the data. Also included are functions to do desp tests
    step-by-step,exploratory path analysis, and Monte Carlo X2 probabilities.
    This package accompanies Shipley, B, (2026).Cause and Correlation in Biology:
     A User's Guide to Path Analysis, StructuralEquations and
     Causal Inference (3rd edition).  Cambridge University Press.

The Penn World Table provides purchasing power parity and
	national income accounts converted to international prices for
	189 countries for some or all of the years 1950-2010.

The Penn World Table 10.x (<https://www.rug.nl/ggdc/productivity/pwt/>) provides information
	on relative levels of income, output, input, and productivity
	for 183 countries between 1950 and 2019.

The Penn World Table 8.x provides information on relative levels of
	income, output, inputs, and productivity for 167 countries
	between 1950 and 2011.

The Penn World Table 9.x (<http://www.ggdc.net/pwt/>) provides information
	on relative levels of income, output, inputs, and productivity
	for 182 countries between 1950 and 2017.