For anyone reading this who hasn't heard of John Hagel or The Power of Pull, I encourage you to research the text and consider reading it. In brief, the authors posit that social media and collaborative technology platforms have fundamentally changed the rules and costs of exchanging information and forming groups. The consequence of this shift is that people are now able to "pull" information/resources they require as needed and on-demand instead of in the old "push" model, where organizations disseminated information to clusters of people, often based on forecasts, market research, and guesses.
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This is part of my 31 (More) Days of #BIF7 blog series.