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  2. Push and pull factors in migration - Wikipedia

    en.wikipedia.org/wiki/Push_and_pull_factors_in...

    Push and pull factors in migration according to Everett S. Lee (1917-2007) are categories that demographers use to analyze human migration from former areas to new host locations. Lee's model divides factors causing migrations into two groups of factors: push and pull.

  3. Push–pull strategy - Wikipedia

    en.wikipedia.org/wiki/Pushpull_strategy

    A hybrid push–pull strategy, usually suggested for products which uncertainty in demand is high, while economies of scale are important in reducing production and delivery costs. An example of this strategy is the furniture industry, where production strategy has to follow a pull-based strategy, since it is impossible to make production ...

  4. Linear model of innovation - Wikipedia

    en.wikipedia.org/wiki/Linear_model_of_innovation

    Two versions of the linear model of innovation are often presented: "technology push" model [3] "market pull" model [3]; From the 1950s to the Mid-1960s, the industrial innovation process was generally perceived as a linear progression from scientific discovery, through technological development in firms, to the marketplace. [3]

  5. Push–pull - Wikipedia

    en.wikipedia.org/wiki/Pushpull

    Human migration#Push and Pull, factors pushing migrants out from home, or pulling them toward a new host; Push–pull agricultural pest management, in farming, an intercropping strategy for controlling agricultural pests. Push–pull strategy, in logistics, supply chain management and marketing; Push–pull workout, a type of weight-lifting routine

  6. Harris–Todaro model - Wikipedia

    en.wikipedia.org/wiki/Harris–Todaro_model

    The Harris–Todaro model, named after John R. Harris and Michael Todaro, is an economic model developed in 1970 and used in development economics and welfare economics to explain some of the issues concerning rural-urban migration.

  7. Big push model - Wikipedia

    en.wikipedia.org/wiki/Big_push_model

    The major contributions to the concept of the Big Push were made by Paul Rosenstein-Rodan in 1943 and later on by Murphy, Shleifer and Vishny in 1989. Also, some contributions of Matsuyama (1992), Krugman (1991) and Romer (1986) proved to be seminal for later literature on the Big Push. Analysis of this economic model usually involves using ...

  8. Dem Washington pol, 30, pressured aide into relationship and ...

    www.aol.com/news/dem-washington-pol-30-sued...

    Clouse, 30, fired Hersey just 30 minutes after he reported the relationship and alleged sexual harassment to county authorities on July 29, he alleges.

  9. Push–pull output - Wikipedia

    en.wikipedia.org/wiki/Pushpull_output

    A Class B push–pull output driver using a pair of complementary PNP and NPN bipolar junction transistors configured as emitter followers. A push–pull amplifier is a type of electronic circuit that uses a pair of active devices that alternately supply current to, or absorb current from, a connected load. This kind of amplifier can enhance ...