survivorship curve

(noun)

a graph of the number of individuals surviving at each age interval plotted versus time

Related Terms

  • mortality rate
  • life table

Examples of survivorship curve in the following topics:

  • The Study of Population Dynamics

    • Demography, or the study of population dynamics, is studied using tools such as life tables and survivorship curves.
    • Trees, marine invertebrates, and most fishes exhibit a Type III survivorship curve.
    • Survivorship curves show the distribution of individuals in a population according to age
    • Birds have a Type II survivorship curve, as death at any age is equally probable.
    • Distinguish between life tables and survivorship curves as used in demography
  • Sampling Bias

    • This section discusses various types of sampling biases including self-selection bias and survivorship bias.
    • Survivorship bias occurs when the observations recorded at the end of the investigation are a non-random set of those present at the beginning of the investigation.
    • Gains in stock funds is an area in which survivorship bias often plays a role.
    • There is good evidence that this survivorship bias is substantial (Malkiel, 1995).
    • However, this would ignore the survivorship bias occurring because only a subset of aircraft return.
  • Curve Sketching

    • Curve sketching is used to produce a rough idea of overall shape of a curve given its equation without computing a detailed plot.
    • Determine the symmetry of the curve.
    • If the exponent of $x$ is always even in the equation of the curve, then the $y$-axis is an axis of symmetry for the curve.
    • Determine the asymptotes of the curve.
    • Also determine from which side the curve approaches the asymptotes and where the asymptotes intersect the curve.
  • Exercises

    • Give an example of survivorship bias not presented in this text.
  • Theories of Life History

    • Modern theories of life history incorporate life and survivorship factors with ecological concepts associated with r- and K-selection theories.
    • This includes the way they obtain resources and care for their young, as well as length of life and survivorship factors.
  • Demand Schedules and Demand Curves

    • A demand curve depicts the price and quantity combinations listed in a demand schedule.
    • The curve can be derived from a demand schedule, which is essentially a table view of the price and quantity pairings that comprise the demand curve.
    • The demand curve of an individual agent can be combined with that of other economic agents to depict a market or aggregate demand curve.
    • In this manner, the demand curve for all consumers together follows from the demand curve of every individual consumer.
    • The demand curve in combination with the supply curve provides the market clearing or equilibrium price and quantity relationship.
  • The Relationship Between the Phillips Curve and AD-AD

    • Changes in aggregate demand cause movements along the Phillips curve, all other variables held constant.
    • The Phillips curve shows the inverse trade-off between rates of inflation and rates of unemployment.
    • The Phillips curve and aggregate demand share similar components.
    • Now, imagine there are increases in aggregate demand, causing the curve to shift right to curves AD2 through AD4.
    • These two factors are captured as equivalent movements along the Phillips curve from points A to D.
  • The Supply Curve in Perfect Competition

    • In economics, a cost curve is a graph that shows the costs of production as a function of total quantity produced.
    • In a free market economy, firms use cost curves to find the optimal point of production (minimizing cost).
    • The various types of cost curves include total, average, marginal curves.
    • Some of the cost curves analyze the short run, while others focus on the long run.
    • When a table of costs and revenues is available, a firm can plot the data onto a profit curve.
  • The Short-Run Phillips Curve

    • The short-run Phillips curve depicts the inverse trade-off between inflation and unemployment.
    • The Phillips curve depicts the relationship between inflation and unemployment rates.
    • During the 1960's, the Phillips curve rose to prominence because it seemed to accurately depict real-world macroeconomics.
    • Given a stationary aggregate supply curve, increases in aggregate demand create increases in real output.
    • The short-run Phillips curve shows that in the short-term there is a tradeoff between inflation and unemployment.
  • Market Supply

    • As a result, the supply curve is upward sloping .
    • Market supply is the summation of the individual supply curves within a specific market.
    • The supply curve can be derived by compiling the price-to-quantity relationship of a seller.
    • The market supply curve is simply the sum of every seller's individual supply curve.
    • The market supply curve is an upward sloping curve depicting the positive relationship between price and quantity supplied.
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