Tomas Dvorak – Medium

Tomas Dvorak

Understanding Alpha

Graphic explainer of the relationship between portfolio mean returns, alpha and beta.

Jun 25

Understanding Alpha

Jun 25

Visualizing the 4% Rule

The 4% rule is a popular retirement income strategy in which retirees withdraw 4% of their initial account balance annually, adjusting the…

Aug 4, 2023

Visualizing the 4% Rule

Aug 4, 2023

Why did some colleges rise and others fall in the rankings?

Yesterday, U.S. News came out with their annual rankings of U.S. colleges and universities. While often criticized, the rankings have an…

Sep 13, 2022

Why did some colleges rise and others fall in the rankings?

Sep 13, 2022

How to rise in college rankings?

Implications for resource allocation within an institution.

Sep 13, 2022

How to rise in college rankings?

Sep 13, 2022

Comparing HSAs to IRAs

It is well known that Health Savings Accounts (HSA) have significant tax advantages: contributions, earnings and withdrawals are all tax…

Jan 14, 2022

Comparing HSAs to IRAs

Jan 14, 2022

What parents and students should know about college outcomes

Where you go to college matters a lot less than what you study.

Aug 2, 2021

What parents and students should know about college outcomes

Aug 2, 2021

How many colleges should I apply to?

Applying to college is a high stakes game. Playing the game without knowing the odds of different outcomes seems imprudent.

Feb 2, 2021

logos of various colleges and universities

Feb 2, 2021

Published in
Towards Data Science

Tableau’s relationships are pretty cool

Unlike joining tables into flat files, relationships preserve the native granularity of data. Joins are performed only as needed.

Jan 21, 2021

Tableau’s relationships are pretty cool

Jan 21, 2021

Published in
Towards Data Science

How should we aggregate classification predictions?

What if you had to predict how many passengers will survive Titanic? Are methods optimized for classification still appropriate?

Aug 24, 2020

How should we aggregate classification predictions?

Aug 24, 2020

Cutting Salaries is Better than Cutting Retirement Plan Contributions

By cutting retirement contributions, colleges and universities are pursuing a highly sub-optimal strategy to cut costs.

Jul 11, 2020

Cutting Salaries is Better than Cutting Retirement Plan Contributions

Jul 11, 2020

Tomas Dvorak

Tomas Dvorak

I am a Professor of Economics at Union College in Schenectady, NY. I spent my last sabbatical on the data science team at a local health insurer.

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