Table 8 — Means of independent variables used in study 



Northern Intermountain 

 Variable Units Region Region 



Sale Characteristics 



SPLT 



$ per M bd ft 



220.05 



235.45 



VOL 



M bd ft 



8,243.63 



8,220.35 



VPA 



M bd ft 



20.37 



10.28 



ACRES 



Acres 



404.77 



800.03 



%TRA 



Percent 



56.93 



86.69 



SPACE 



Feet 



56.64 



56.32 



%GSL 



Percent 



2.80 



4.03 



%CC 



Percent 



69.70 



46.31 



STEEP 



Acres 



47.50 



50.40 



FLAT 



Acres 



236.33 



582.83 



#UNITS 



Number 



17.35 



21.80 



YT 



Feet 



672.26 



659.29 



UHAUL 



Miles 



13.93 



12.27 



PHAUL 



Miles 



20.59 



26.56 



ADBH 



Inches 



13.66 



13.99 



TEMP 



Miles 



1.06 



1.44 



NEW 



Miles 



3.54 



2.56 



RECON 



Miles 



1.87 



1.92 







Sale Requirements 





DUSTR 



1 = Yes 



0.79 



0.82 





= No 







These factors can be applied to any dollar -based number 

 presented in this paper, including means, coefficients, or 

 results such as the $32.63/M bd ft transportation cost 

 estimate just calculated. Assume this value is desired in 

 1987 dollars. Simply locate the conversion factor for 

 1987 shown in the above tabulation (i.e., 1.0567). The 

 converted value ($34.48) is determined by multiplying 

 the value in question by the conversion factor (= 32.63 x 

 1.0567). 



Finally, as with all research, results presented in this 

 paper should not be applied to situations differing appre- 

 ciably from those contained in the timber sales studied. 

 The set of means shown in table 8 shows the magnitude 

 of many sale characteristics. More importantly, sales 

 sampled included only sales of 2 million bd ft or more. 

 Therefore, study results should not be applied to smaller 

 volume sales. Within these limitations, equations pre- 

 sented for cost allowances can serve many uses, espe- 

 cially in analyses related to timber sale planning and 

 design. 



REFERENCES 



Bureau of Census [BOC]. 1987. Statistical abstract of the 

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 partment of Commerce, Bureau of Census. 960 p. 



Bureau of Economic Analysis [BEA]. 1988. Survey of cur- 

 rent business. Washington, DC: U.S. Department of 

 Commerce, Bureau of Economic Analysis. [Various 

 issues]. 



Combes, John A. 1980. The residual value timber ap- 

 praisal as used by the Forest Service and how it works. 

 Unpublished paper on file at: U.S. Department of Agri- 

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 Missoula, MT. 



Draper, N. R.; Smith, H. 1981. Applied regression analy- 

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Kmenta, J. 1971. Elements of econometrics. London: The 

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Sneed, John D.; Link, John P.; Sneed, Robert B. 1986. 

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U.S. Department of Agriculture, Forest Service. 1977. 

 Timber appraisal. Chapter 2420 in Forest Service Man- 

 ual, Title 2400. Washington, DC: U.S. Department of 

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U.S. Department of Agriculture, Forest Service. 1987. 

 USDA Forest Service timber pricing in the West. Final 

 report of the National Appraisals Working Group. Un- 

 published report on file at: U.S. Department of Agricul- 

 ture, Forest Service, Division of Timber Management, 

 Washington, DC. 41 pages plus appendixes. 



Weisberg, Sanford. 1980. Applied linear regression. New 

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