The hottest Correlations Substack posts right now

Certain personality traits like being assertive and energetic can lead to higher earnings, while traits like being anxious or preferring routine work are linked to lower earnings.
A small correlation in data, such as between social media use and depression, can significantly impact outcomes, but it's important to analyze data correctly and not rely solely on models.
Current fertility rates among older Millennials appear similar to older generations, but the context matters; using outdated comparisons can be misleading, and true trends show a decline in fertility.

Interpreting size of correlations using Cohen guidelines - small, medium, large
Comparing effect sizes to others in the literature for context
Understanding correlations using Binomial Effect Size Display (BESD) - practical applications

Certain personality traits like self-esteem and compassion are generally helpful for cognitive abilities.
Some personality traits like neuroticism and anxiety are generally unhelpful for cognitive abilities.
Specific personality traits such as industriousness and openness correlate strongly with verbal ability.

Correlations vary widely over different time intervals, affecting asset allocation decisions.
Shorter time intervals show smaller correlations, while longer intervals have greater variability.
Conservative estimates of correlations using consistent shorter intervals may be more reliable for projecting into the future.

Index funds can make the stock market riskier by increasing how closely stocks move together. When more money goes into these funds, stocks often react in similar ways.
The ownership of stocks by index trackers affects their risk. More index fund ownership leads to higher stock price drops during market downturns, meaning more losses for those stocks.
As index funds grow, the overall market's volatility also increases, making big market drops worse than they used to be. The concern is that everyone could suffer larger losses during a major market downturn.

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Bell inequality is a concept that challenges classical physics theories.
The Bell inequality states certain restrictions on correlations between different entities.
Quantum mechanics experiments have validated the violations of Bell inequality.

The digital asset market has evolved significantly since Bitcoin's inception, with emerging sectors like blockchain infrastructure, on-chain derivatives, DeFi, and NFTs.
Sector correlations, like BTC and ETH, can provide insights into the relationships among different sectors within the digital asset market.
Market volatility varies across sectors, with assets in the Decentralized Finance sector experiencing the highest average volatility in 2023.