A Beveridge curve, or UV-curve, is a graphical representation of the relationship between unemployment and the job vacancy rate (the number of unfilled jobs expressed as a proportion of the labor force). It typically has vacancies on the vertical axis and unemployment on the horizontal. The curve is named after William Beveridge and it is hyperbolic shaped and slopes downwards as a higher rate of unemployment normally occurs with a lower rate of vacancies. If it moves outwards over time, then a given level of vacancies would be associated with higher and higher levels of unemployment, which would imply decreasing efficiency in the labour market. Inefficient labour markets are due to mismatches between available jobs and the unemployed and an immobile labour force.
The position on the curve can indicate the current state of the economy in the business cycle. For example, the recessionary periods are indicated by high unemployment and low vacancies, corresponding to a position on the lower side of the 45 degree line, and likewise high vacancies and low unemployment indicate the expansionary periods, above the 45 degree line.
History of the Beveridge curve 
The Beveridge curve, or UV-curve, was developed in 1958 by two British economists, Dow and Dicks-Mireaux. They were interested in measuring excess demand in the goods market for the guidance of Keynesian fiscal policies and took British data on vacancies and unemployment in the labour market as a proxy, since excess demand is unobservable. By 1958 they had twelve years time series data available since the British Government had started collecting data on unfilled vacancies from notification at labour exchanges in 1946. Dow and Dicks-Mireaux presented the unemployment and vacancy data in an unemployment-vacancy (UV) space, and derived an idealized UV-curve as a rectangular hyperbola after they had connected successive observations. The UV-curve, or Beveridge-curve, enabled economists to employ an analytical method—which later became known as UV-analysis—for the decomposition of unemployment into different types of unemployment: into deficient-demand (or cyclical) unemployment and structural unemployment. In the first half of the 1970s this method was refined by economists of the National Institute of Economic and Social Research (NIESR) in London, so that a classification arose that corresponded to the ‘traditional’ classification: a division of unemployment into frictional, structural, and deficient demand unemployment. Both the Beveridge-curve and the Phillips-curve bear implicit macroeconomic notions of equilibrium in markets, though these notions are inconsistent and conflicting. Most likely because the Beveridge-curve enabled economists to analyze many of the problems Beveridge addressed, such as, mismatch between unemployment and vacancies, both at aggregate level and industry levels, trend versus cyclical changes and measurement problems of vacancies, the curve was named in the 1980s after William Beveridge (1879–1963). Beveridge, however, never drew the curve and the exact origin of the name remains obscure.
Movements of the Beveridge-curve 
The Beveridge Curve can move for the following reasons:
- The matching process will determine how efficiently workers find new jobs. Improvements in the matching system would shift the curve towards the origin, because an efficient matching process will find jobs faster- filling vacancies and employing the unemployed. Improvements can be the introduction of agencies (‘job centres’), lower rates of unionisation, and increasing the mobility of labour.
- Skills mismatches occur when changes in the skills employers want differ from the available skills in the labour pool. Greater mismatches would shift the Beveridge Curve outward. If this were the driving factor behind the shift, one would expect to also see employers bid up wages for the few candidates who were desirable. Although the U.S. Beveridge Curve shifted outward in the 2010-2012 period, wages did not increase.
- Labour force participation rate; as the number looking for jobs increases relative to total population, the unemployment rate increases, shifting the curve outwards from the origin. Labour force participation can increase due to changes in education, gender roles, population age and immigration.
- Long-term unemployment will push the curve outward from the origin. This could be caused by; deterioration of human capital or a negative perception of the unemployed by the potential employers.
- Frictional unemployment; a decrease in frictions would reduce the number of firms searching for employees and the number of unemployed searching for jobs. This would shift the curve towards the origin. Frictional unemployment is due to job losses, resignations and job creation.
- Economic and policy uncertainty may cause employers to hold vacancies open longer in the search for the "perfect candidate," particularly when there is high unemployment with a large number of candidates from which to choose. More uncertainty would tend to shift the curve outward.
See also 
- Dow, J. C. R.; Dicks-Mireaux, L. (1958). "The Excess Demand for Labour: A Study of Conditions in Great Britain, 1946-1956". Oxford Economic Papers 10 (1): 1–33. JSTOR 2661871.
- Rodenburg, P. (2010). "The UV-Curve or Beveridge Curve". In Blaug, M.; Lloyd, P. Famous Figures and Diagrams in Economics. Cheltenham, UK: Edward Elgar. ISBN 978-1-84844-160-6.
- Brown, A. J. (1976). "UV-analysis". In Worswick, G. D. N. The Concept and Measurement of Involuntary Unemployment. London: George Allen & Unwin. ISBN 0-04-331065-6.
- Rodenburg, P. (2011). "The Remarkable Transformation of the UV curve". European Journal of the History of Economic Thought 18 (1): 125–153. doi:10.1080/09672567.2011.546080.
- Yashiv, E. (2008). "Beveridge Curve". In Durlauf, S. N.; Blume, L. E. The New Palgrave Dictionary of Economics (Second ed.). Palgrave Macmillan. doi:10.1057/9780230226203.0131.
- Nickell, S.; Nunziata, L.; Ochel, W.; Quintini, G. (2001). The Beveridge Curve, Unemployment and Wages in the OECDfrom the 1960s to the 1990s. Retrieved 2008-10-07.
- Catherine Rampell (March 2013). "An Odd Shift in an Unemployment Curve". NYT. Retrieved March 2013.