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The Winton M. Blount Postal History Symposia - Smithsonian ...

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n u m b e r 5 5 • 3 5different geographic and demographic areas differently inboth time and intensity. It is our hope that careful analysisof regional and nationwide OR data will reveal these temporaland spatial changes in the business cycle at a level ofdetail heretofore unavailable.ConclusionsOur analysis of the OR data from the State of NewHampshire has shown that these data hold considerablepromise as a source of previously unavailable insights intoeconomic and demographic variables during the nineteencentury. We have specifically examined population effectsand the effects of one recession on postal income. <strong>The</strong> ORdata can be used to examine a number of other interestinghistorical trends. For example, how does the use of thepostal service change with the advent of improved transportationand other communication systems such as railroads,telegraph lines, and road construction? Does theintegration of the frontier and the re-integration of theSouth following the Civil War manifest in the OR data?It should be mentioned here that similar data are availablefrom Canada. In Canada, from at least Confederationuntil 1948, local postmaster compensation was based onthe income accruing to each individual post office. 21 Thiscompensation data is found in the annual report of thepostmaster general printed each year in the Sessional Papersof Parliament. <strong>The</strong> reports of the postmaster generalalso give very valuable statistical data not found in anyUS official document. For every post office issuing moneyorders, the annual report gives the total value of moneyorders issued and cashed by that office. Further, for at leastsome years (neither of us have yet been able to examine acomplete run of the postmaster general reports), data onthe number and value of money orders issued in one provincedestined for another province is given, as well as thenumber and value of money orders issued in the secondprovince that were paid in the first province. <strong>The</strong> postmastergeneral reports also give, for at least some years,information on the number and value of money orders issuedto and received from other countries.Returning to the compensation data, given that inCanada postmaster compensation was based on postalbusiness, it might be suspected that a similar practice wasfollowed in Great Britain. This is not the case. In Britain,at least during the nineteenth century, postmaster salarywas based on the individual’s grade and not on theamount of business done by the office.STATISTICAL APPENDIX<strong>The</strong> Pearson Product Moment Correlation Coefficient<strong>The</strong> Pearson product moment correlation coefficient isone of a family of correlational techniques and probablythe one most commonly used in research. A correlation isa number between negative one and positive one that indicatesthe strength of the relationship between two variables.A positive correlation indicates that when the value of onevariable increases (or decreases), the value of the other variablechanges in the same direction. A negative correlationindicates that a change in one variable is associated with achange in the opposite direction of the other variable. In thetext, the value of the Pearson correlation coefficient is indicatedby the symbol lower case r, as in “r = 0.66.”NOTES1. P. A. Coclanis, ed., <strong>The</strong> Atlantic Economy During theSeventeenth and Eighteenth Centuries: Organization, Operation,Practice and Personnel (Columbia, S. C.: University ofSouth Carolina, 2005).2. M. Abromovitz, and P. A. David, “American macroeconomicgrowth in the era of knowledge-based progress: <strong>The</strong> longrunperspective.” In Cambridge Economic <strong>History</strong> of the UnitedStates, Vol. III, ed. S. L. Engerman and R. E. Gallman (Cambridge,U. K.: Cambridge University Press, 2000), 6.3. A. H. Jones, Wealth of a Nation to Be: <strong>The</strong> AmericanColonies on the Eve of the Revolution (New York: ColumbiaUniversity Press, 1980).4. J. Hughes and L. P. Cain, American Economic <strong>History</strong>(Boston: Addison Wesley, 2007), 50–51.5. Abramovitz and David, “American macroeconomicgrowth,” 66.6. J. Komlos, “<strong>The</strong> height and weight of West Point cadets:Dietary change in antebellum America,” Journal of Economic<strong>History</strong>, 47:897–927, 1987.7. L. E. Davis, American Economic Growth: An Economist’s<strong>History</strong> of the United States (New York: Harper and Row,1972), 16.8. R. D. Harris, “<strong>The</strong> Official Register. Part 1,” Post Script,2:12–20, 1977; A. Hecht, “Official Register of the UnitedStates,” American Philatelist, 74(12):891–894, 930–931, 1961.9. Joint Commission of <strong>Postal</strong> Services, “Memorandumconcerning compensation of postmasters and method of determiningsame, etc.” In <strong>Postal</strong> Salaries: Final Report of the JointCommission on <strong>Postal</strong> Salaries (66th Congress, 3rd Session, SenateDocument No. 422, Vol. 1, 1921), 102–118.10. K. Stach, “A statistical analysis of Nebraska Territorialpostal history,” La Posta, 33(6):15–19, 2003; K. Stach, “A

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