Statistical Software Components
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- PAYPER: Stata module to compute the periodic payment and the entire schedule of a loan or annuity

- Máximo Sangiácomo
- PBETA: Stata module to generate probability plot for data compared with fitted beta distribution

- Nicholas Cox
- PBREG: Stata module to fit the Preece and Baines (1978) family of growth curves and age, height, and velocity at peak height velocity

- Adrian Sayers
- PCA2: Stata module to apply Principal Component Analisys (PCA) to standard and GMM-style instrumental variables

- Maria Bontempi and Irene Mammi
- PCACOEFSAVE: Stata module to save results of PCA to new dataset

- Nicholas Cox
- PCCMTOOLKIT: Stata module to calculate pediatric risk of mortality scores

- Razvan Azamfirei, Colleen Mennie, James Fackler and Sapna R. Kudchadkar
- PCDID: Stata module to perform principal components difference-in-differences

- Marc Chan and Simon Sai Man Kwok
- PCDSEARCH: Stata module to extract code lists from primary care databases

- Evangelos Kontopantelis
- PCHIPOLATE: Stata module for piecewise cubic Hermite interpolation

- Nicholas Cox
- PCIPLOT: Stata module to plot pointwise confidence intervals

- Patrick Royston
- PCM: Stata module to estimate the parameters of a Partial Credit Model (PCM) or of a Rating Scale Model (RSM)

- Jean-Benoit Hardouin and Myriam Blanchin
- PCMDIF: Stata module to for diagnosing and considering a potential differential item functioning (DIF) when analysing patient reported outcomes using partial credit models

- Jean-Francois Hamel-Broza
- PCMODEL: Stata module to estimate parameters of a Partial Credit Model or a Rating Scale Model by MML

- Jean-François Hamel
- PCMTEST: Stata module to test the fit of a Partial Credit Model or a Rating Scale Model estimated using pcmodel

- Jean-François Hamel
- PCORR2: Stata module to display partial and semipartial correlation coefficients

- Richard Williams
- PCORRMAT: Stata module to compute partial correlation coefficients controlled for a fixed set of covariates

- Maarten Buis
- PCPANEL: Stata module to perform power calculations for randomized experiments with panel data, allowing for arbitrary serial correlation

- Fiona Burlig, Louis Preonas and Matt Woerman
- PCTILESETS: Stata module for percentile or quantile sets for selected levels

- Nicholas Cox
- PCTRIM: Stata module to trim variables based on percentiles

- Michael Barker
- PDBVRAR: GAUSS module to Construct Portfolios via the Maximization of the Risk Adjusted Return

- Abdulnasser Hatemi-J and Alan Mustafa
- PDC: Stata module for computing the Proportion of Days Covered (of a medication)

- Ariel Linden
- PDFHESTON: MATLAB function to evaluate the probability density function in the Heston (1993) model

- Agnieszka Janek and Rafał Weron
- PDFPLOT: Stata module to Plot a Distribution's Probability Density Function

- Jacob Triplett
- PDI: Stata module to calculate the polytomous discrimination index (PDI)

- Chao Wang
- PDPLOT: Stata module to produce Pareto dot plot

- Nicholas Cox
- PDSLASSO: Stata module for post-selection and post-regularization OLS or IV estimation and inference

- Achim Ahrens, Christian Hansen and Mark Schaffer
- PEERMEAN: Stata module to compute mean of Peer firms

- Yujun Lian
- PEERREVIEW: Stata module to randomly assign papers to peers for review

- Wouter Wakker
- PEM: Stata Module to Estimate Partial EquiLibrium Model (PEM)

- Emad Shehata and Sahra Mickaiel
- PENTROPY: GAUSS module to compute Permutation Entropy point estimates of a time series

- Erica Clower and Miguel Henry
- PERCAT: Stata module to perform percentile-based categorisation

- Mehmet Mehmetoglu
- PERCENTMATCH: Stata module to calculate the highest percentage match (near duplicates) between observations

- Noble L. Kuriakose
- PERCOM: Stata module to create permutations and combinations

- Muhammad Rashid Ansari
- PERRONBREAKS: RATS procedure to compute various unit root tests with breaks

- Tom Doan
- PERRONNGMTESTS: RATS procedure to compute various Perron-Ng "M" unit root tests

- Tom Doan
- PERRONRODRIGUEZ: RATS procedure to perform Perron-Rodriguez unit root test allowing for break at unknown date

- Tom Doan
- PERSIST: RATS procedure to compute sum of coefficients of a MA representation for a series

- Tom Doan
- PERSONAGE: Stata module to calculate people's ages or similar daily date differences

- Nicholas Cox
- PERSUASIO: Stata module to estimate the effect of persuasion and conduct inference

- Sung Jae Jun and Sokbae (Simon) Lee
- PERTURB: Stata module to evaluate collinearity and ill-conditioning

- John Hendrickx
- PESCADF: Stata module to perform Pesaran's CADF panel unit root test in presence of cross section dependence

- Piotr Lewandowski
- PETPOISSON: Stata module to estimate an Endogenous Participation Endogenous Treatment Poisson model by MSL

- Alfonso Miranda
- PEXP: Stata module to produce probability plot for data compared with fitted exponential distribution

- Nicholas Cox
- PFS: Stata module to predict Financial Skill scale scores from CFPB survey instrument

- Austin Nichols
- PFWB: Stata module to predict Financial Well-Being scale scores from CFPB survey instrument

- Austin Nichols
- PGAMMA: Stata module to generate probability plot for data vs fitted gamma distribution

- Nicholas Cox
- PGMHAZ8: Stata module to estimate discrete time (grouped data) proportional hazards models

- Stephen Jenkins
- PHACK_DEROUND: Stata module to deround coefficients and standard errors for meta-analysis

- Nikolai Cook
- PHEATPLOT: Stata module to visualize p-values

- Elisa Brini, Solveig T. Borgen and Nicolai T. Borgen
- PHENOTYPE: Stata module to simulate disease status and censored age for family data

- James Cui