NEDL

Ridge regression explained: Regression robust to multicollinearity (Excel)

Gravity model of trade explained (Excel)

Covariance and correlation matrices: Three methods (Excel)

Internal rate of return (IRR): Three approximations (Excel)

Multiple testing adjustment: Bonferroni, Holm, Chow-Denning, and Wilson (Excel)

The mathematics of consumer and producer surplus

Market equilibrium explained: the mathematics of supply and demand

Advanced pair trading in Python: beta loading, optimal entry, and stop-losses

Modelling stock returns: Skewed generalised error distribution (Excel)

An intuitive explanation of the derivative: instant speed and tangent slopes

Amihud measure explained: liquidity risk of stocks (Excel)

Two proportion Z-test explained (Excel)

One proportion Z-test explained (Excel)

Quantile regression explained: Estimating conditional quantiles (Excel)

Kernel density estimation (Excel)

Simulating portfolios: equal, value, fixed, and drifting weights (Excel)

KPSS test explained: Time series stationarity (Excel)

Kendall's Tau explained: Non-parametric correlation (Excel)

Optimal number of stocks in a diversified portfolio (Excel)

Coleman-Liau index explained: Measuring text readability (Excel)

Baumol-Tobin model explained: transaction money demand (Excel)

Appraisal ratio explained (Excel)

Tracking error and information ratio explained (Excel)

Spearman rank correlation explained: correlation with outliers and non-normality (Excel)