Common Error Messages and Solutions | "Auxiliary regression failed" | "Log of negative values" | Performance Issues | Large Datasets | Convergence Problems | Interpretation Guidelines | When Tests Disagree | Power Considerations

1. Fit an initial model | 2. Diagnose heteroscedasticity | 3. Apply a remedy | 4. Compare models | 5. Check the variance function

Case study 1: Seismic station counts | Case study 2: Income volatility in simulated survey data | Case study 3: Engineering reliability assessment | Summary

Other available tests | Earthquake station-count example | Theophylline dosing example | Step-by-step workflow | Statistical Accuracy and Validation | Cross-Package Validation | Performance and Memory Considerations | Large Datasets | Recommendations for Large Datasets | Memory Management Tips

Motivation | White's test | Breusch–Pagan test | Koenker's studentised test | Park and Harvey logarithmic tests | Visual interpretation | Further reading

Introduction | Theoretical Background | What is Heteroscedasticity? | When Does It Matter? | Test Catalog | Regression-Based Tests | White's Test | Breusch-Pagan Test | Graphical Diagnostics | Practical Examples | Example 1: Financial Time Series | Example 2: Cross-Sectional Data | Example 3: Panel Data | Remediation Strategies | Comparison with Other Packages | References

1. Fit an initial model | 2. Diagnose heteroscedasticity | 3. Apply a remedy | 4. Compare models

Simulation design | Type I error control | Power against structured alternatives | Practical guidance

Case study 1: Seismic station counts | Case study 2: Income volatility in simulated survey data | Case study 3: Engineering reliability assessment | Summary

Motivation | White's test | Breusch–Pagan test | Koenker–Bassett studentised test | Park and Harvey logarithmic tests | Visual interpretation | Further reading

Common Error Messages and Solutions | "Auxiliary regression failed" | "Log of negative values" | Performance Issues | Large Datasets | Convergence Problems | Interpretation Guidelines | When Tests Disagree | Power Considerations

Other available tests | Earthquake station-count example | Theophylline dosing example | Step-by-step workflow | Statistical Accuracy and Validation | Cross-Package Validation | Performance and Memory Considerations | Large Datasets | Recommendations for Large Datasets | Memory Management Tips

Introduction | Theoretical Background | What is Heteroscedasticity? | When Does It Matter? | Test Catalog | Regression-Based Tests | White's Test | Breusch-Pagan Test | Graphical Diagnostics | Practical Examples | Example 1: Financial Time Series | Example 2: Cross-Sectional Data | Example 3: Panel Data | Remediation Strategies | Comparison with Other Packages | References

Simulation design | Type I error control | Power against structured alternatives | Practical guidance