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  2. Shift-share analysis - Wikipedia

    en.wikipedia.org/wiki/Shift-share_analysis

    Formula [ edit ] The regional change in the variable e within industry i between the two years t and t + n is defined as the sum of the four shift-share effects: national growth effect ( NS i ), industry mix effect ( IM i ), regional share effect ( RS i ), and allocation effect ( AL i ).

  3. Negative binomial distribution - Wikipedia

    en.wikipedia.org/wiki/Negative_binomial_distribution

    Different texts (and even different parts of this article) adopt slightly different definitions for the negative binomial distribution. They can be distinguished by whether the support starts at k = 0 or at k = r, whether p denotes the probability of a success or of a failure, and whether r represents success or failure, [1] so identifying the specific parametrization used is crucial in any ...

  4. Matter wave - Wikipedia

    en.wikipedia.org/wiki/Matter_wave

    Using two formulas from special relativity, one for the relativistic mass energy and one for the relativistic momentum = = = = allows the equations for de Broglie wavelength and frequency to be written as = = = =, where = | | is the velocity, the Lorentz factor, and the speed of light in vacuum.

  5. Forward rate - Wikipedia

    en.wikipedia.org/wiki/Forward_rate

    To extract the forward rate, we need the zero-coupon yield curve.. We are trying to find the future interest rate , for time period (,), and expressed in years, given the rate for time period (,) and rate for time period (,).

  6. Streeter–Phelps equation - Wikipedia

    en.wikipedia.org/wiki/Streeter–Phelps_equation

    On the DO sag curve a minimum concentration occurs at some point, along a stream. If the Streeter–Phelps equation is differentiated with respect to time, and set equal to zero, the time at which the minimum DO occurs is expressed by

  7. Antimatter - Wikipedia

    en.wikipedia.org/wiki/Antimatter

    The reaction of 1 kg of antimatter with 1 kg of matter would produce 1.8 × 10 17 J (180 petajoules) of energy (by the mass–energy equivalence formula, E=mc 2), or the rough equivalent of 43 megatons of TNT – slightly less than the yield of the 27,000 kg Tsar Bomba, the largest thermonuclear weapon ever detonated.

  8. Section modulus - Wikipedia

    en.wikipedia.org/wiki/Section_modulus

    Section modulus is a geometric property of a given cross-section used in the design of beams or flexural members. Other geometric properties used in design include: area for tension and shear, radius of gyration for compression, and second moment of area and polar second moment of area for stiffness.

  9. Runge–Kutta methods - Wikipedia

    en.wikipedia.org/wiki/Runge–Kutta_methods

    The function r is called the stability function. [31] It follows from the formula that r is the quotient of two polynomials of degree s if the method has s stages. Explicit methods have a strictly lower triangular matrix A , which implies that det( I − zA ) = 1 and that the stability function is a polynomial.

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