tptest
Universal Turning Point and Inflection Point Tests
Performs turning point and inflection point tests for U-shaped and inverse U-shaped relationships in regression models. Implements the Sasabuchi (1980) test as extended by Lind and Mehlum (2010) with support for quadratic, cubic, log-quadratic, and inverse functional forms. Features include delta-method standard errors, Fieller confidence intervals, Simonsohn (2018) two-lines test, and parametric bootstrap. Designed for post-estimation analysis of linear models, panel models, and quantile regression. References: Lind and Mehlum (2010) <doi:10.1111/j.1468-0084.2009.00569.x>; Sasabuchi (1980); Fieller (1954) <doi:10.1111/j.2517-6161.1954.tb00159.x>.
Versions across snapshots
| Version | Repository | File | Size |
|---|---|---|---|
1.0.3 |
rolling linux/jammy R-4.5 | tptest_1.0.3.tar.gz |
80.5 KiB |
1.0.3 |
rolling linux/noble R-4.5 | tptest_1.0.3.tar.gz |
80.5 KiB |
1.0.3 |
rolling source/ R- | tptest_1.0.3.tar.gz |
31.7 KiB |
1.0.3 |
latest linux/jammy R-4.5 | tptest_1.0.3.tar.gz |
80.5 KiB |
1.0.3 |
latest linux/noble R-4.5 | tptest_1.0.3.tar.gz |
80.5 KiB |
1.0.3 |
latest source/ R- | tptest_1.0.3.tar.gz |
31.7 KiB |
1.0.3 |
2026-04-26 source/ R- | tptest_1.0.3.tar.gz |
31.7 KiB |
1.0.3 |
2026-04-23 source/ R- | tptest_1.0.3.tar.gz |
31.7 KiB |