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  2. Rule of 72 - Wikipedia

    en.wikipedia.org/wiki/Rule_of_72

    Thus at 3.5% inflation using the rule of 70, it should take approximately 70/3.5 = 20 years for the value of a unit of currency to halve. [ 1 ] To estimate the impact of additional fees on financial policies (e.g., mutual fund fees and expenses , loading and expense charges on variable universal life insurance investment portfolios), divide 72 ...

  3. How to budget with the 50/30/20 rule: A simple, effective ...

    www.aol.com/finance/50-30-20-budgeting-rule...

    Try a 70/20/10 rule — with 70% for needs, 20% for savings and debt repayment and 10% for non-essential wants. You want to pay down high-interest debt faster. ... Creating a debt-free plan.

  4. Retirement spend-down - Wikipedia

    en.wikipedia.org/wiki/Retirement_spend-down

    A common rule of thumb for withdrawal rate is 4%, based on 20th century American investment returns, and first articulated in Bengen (1994). [14] Bengen later stated the 4% guideline was intended as a "worst case scenario" for retirees in United States, using a hypothetical example of someone who retired in 1968 at a stock market peak before a ...

  5. Secretary problem - Wikipedia

    en.wikipedia.org/wiki/Secretary_problem

    The cutoff rule (CR): Do not accept any of the first y applicants; thereafter, select the first encountered candidate (i.e., an applicant with relative rank 1). This rule has as a special case the optimal policy for the classical secretary problem for which y = r. Candidate count rule (CCR): Select the y-th encountered candidate. Note, that ...

  6. Income tax in the United States - Wikipedia

    en.wikipedia.org/wiki/Income_tax_in_the_United...

    Where conflicts exist between two authorities in the same tier, the "last-in-time rule" is applied. As the name implies, the "last-in-time rule" states that the authority that was issued later in time is controlling. [4] Regulations and case law serve to interpret the statutes. Additionally, various sources of law attempt to do the same thing.

  7. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  8. Obama vs. Romney Electoral Map - The Huffington Post

    elections.huffingtonpost.com/2012/romney-vs...

    Maps and electoral vote counts for the 2012 presidential election. Our latest estimate has Obama at 281 electoral votes and Romney at 191.

  9. Vitality curve - Wikipedia

    en.wikipedia.org/wiki/Vitality_curve

    The often cited "80-20 rule", also known as the "Pareto principle" or the "Law of the Vital Few", whereby 80% of crimes are committed by 20% of criminals, or 80% of useful research results are produced by 20% of the academics, is an example of such rankings observable in social behavior.