Civil Rights
Movements, leaders, victories and the continuing fight for equality.
Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
Mansa Musa was the ruler of the Mali Empire in West Africa. Details recorded here should be sourced; unknown information is left blank.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
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Policy uncertainty (also called regime uncertainty) is a class of economic risk where the future path of government policy is uncertain, raising risk premia and leading businesses and individuals to delay spending and investment until this uncertainty has been resolved.[1] Policy uncertainty may refer to uncertainty about monetary or fiscal policy, the tax or regulatory regime, or uncertainty over electoral outcomes that will influence political leadership.
During the Great Recession of the late 2000s and the years following it, many academics, policymakers, and business leaders have asserted that levels of policy uncertainty had risen dramatically and had contributed to the depth of the recession and the weakness of the following recovery.[2][3]

Much of the policy uncertainty in the United States has revolved around fiscal policy as well as uncertainty over the tax code. This is best exemplified by partisan fights in the United States Congress over the Fiscal Cliff and raising the debt ceiling.[4] In addition, important pieces of environmental, energy, healthcare, and financial regulation were disputed in Congress and the wider political arena during these years.
Policy uncertainty in Europe has been an issue due to uncertainty over the European Sovereign Debt Crisis and its possible outcomes. The future path of government spending, potential bailouts, monetary policy by the European Central Bank have been widely speculated on, making for a highly uncertain business environment.[5][6][7]
Frank Hyneman Knight (1885 - 1972), one of the founders of the Chicago school, known for his Risk Uncertainty and Profit,[8] a monumental study of the role of the entrepreneur in economic life in which he distinguished between economic risk and so-called Knightian uncertainty.[8] Situations with risk were those where the outcomes were unknown but governed by probability distributions known at the outset. He argued that these situations, where decision making rules such as maximising expected utility can be applied, differ in a deep way from "uncertain" ones, where the outcomes were likewise random, but governed by an unknown probability model. Knight argued that uncertainty gave rise to economic profits that perfect competition could not eliminate.
A related concept developed by Robert Higgs,[9] regime uncertainty is about more than the government's laws, regulations, and administrative decisions. For one thing, as the saying goes, "personnel is policy." A business-hostile administration will provoke more apprehension among investors than a business-friendlier administration, even if the underlying "rules of the game" are identical on paper. Similar differences between judiciaries create uncertainties about how the courts will rule on contested laws and government actions.
Additionally, seemingly neutral changes in policies or personnel may have major implications for specific types of investment. Even when government changes the rules in a way that seemingly strengthens private-property rights overall, the action's specific form may jeopardize particular types of investment, and apprehension about such a threat may paralyze investors in these areas. Moreover, it may also give pause to investors in other areas, who fear that what the government has done to harm others today, it may do to them tomorrow. In sum, heightened uncertainty in general — a perceived increase in the potential variance of all sorts of relevant government action — may deter investment even if expectations shift toward more secure private-property rights.[10]
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Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
Policy uncertainty (also called regime uncertainty) is a class of economic risk where the future path of government policy is uncertain, raising risk premia and leading businesses and individuals to delay spending and investment until this uncertainty has been resolved. Policy uncertainty may refer to uncertainty about monetary or fiscal policy, the tax or regulatory regime, or uncertainty over electoral outcomes that will influence political leadership.
Uncertainty and Quality in Science for Policy is a 1990 book by Silvio Funtowicz and Jerome Ravetz, in which the authors explain the notational system NUSAP (numeral, unit, spread, assessment, pedigree) and applies it to several examples from the environmental sciences. The work is considered foundational to the development of post-normal science.
Tax uncertainty is the term for the economic risk that results when future taxes and tax rates are undetermined. Similar to policy uncertainty, tax uncertainty can impact both individuals and businesses and has been shown in some studies to slow rates of economic growth.
Nicholas Alexander Bloom (born 5 May 1973) is the William Eberle Professor in the Department of Economics at Stanford University, a courtesy professor at Stanford Business School and Stanford Institute for Economic Policy Research, and a co-director of the Productivity, Innovation and Entrepreneurship Program at the National Bureau of Economic Research. He is a Fellow of the American Academy of Arts and Sciences and the Econometric Society, and the recipient of the Frisch Medal in 2010, the Bernacer Prize in 2012, the Center for Economic Studies Distinguished Fellow award in 2020, the Guggenheim Fellowship in 2022 and the 50 Most Influential (Bloomberg ranking) in 2022. His research focuses on the measurement and impact of uncertainty on investment, employment and growth. He also works on the measurement of management practices and productivity with Raffaella Sadun and John Van Reenen, on working from home, and on innovation. He co-founded research websites on policy uncertainty, global uncertainty, UK uncertainty, management and working from home.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Mae Jemison, aboard Space Shuttle Endeavour in 1992.