Appendix F: Index Comparisons: Heavy and Light Rail Composite Input Cost Indices Versus the Producer Price Index (PPI) |
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Index Comparisons Heavy Rail Cost Index -- Total Level Tests, Interval Q, 85:1 to 94:2 CORRELATION VECTOR ------------------ DATED QUARTERLY(1985:1 TO 1994:2) (0) 0) #HR 1.000 1) #PPI 0.961 ORDINARY LEAST SQUARES ---------------------- QUARTERLY(1985:1 TO 1994:2) 38 OBSERVATIONS DEPENDENT VARIABLE: #HR COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE -0.0391359 0.05583 -0.7010 CONSTANT 1) 1.08382 0.05183 20.91 #PPI R-BAR SQUARED: 0.9218 DURBIN-WATSON STATISTIC: 0.3313 STANDARD ERROR OF THE REGRESSION: 0.02183 NORMALIZED: 0.01939 Levels, Heavy Rail Cost Index (#HR) Solid Line, PPI Shaded Line Light Rail Cost Index -- Total, (LR) Percent Change Tests, Interval Q, 85:2 to 94:2 AVG(%(LR)) = 0.7 AVG(%(PPI)) = 0.4 STDDEV(%(LR)) = 0.302 STDDEV(%(PPI)) = 1.055 CORRELATION VECTOR ------------------ DATED QUARTERLY(1985:2 TO 1994:2) (0) 0) %(LR) 1.000 1) %(PPI) -0.017 ORDINARY LEAST SQUARES ---------------------- QUARTERLY(1985:2 TO 1994:2) 37 OBSERVATIONS DEPENDENT VARIABLE: %(LR) COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE 0.661434 0.04672 14.16 CONSTANT 1) 0.0107239 0.04141 0.2590 %(PPI) 2) 0.296483 0.07814 3.794 +0.64*SEASONQ1+0.36*SEASONQ2- 0.16*SEASONQ3-0.84*SEASONQ4 R-BAR SQUARED: 0.2563 DURBIN-WATSON STATISTIC: 1.0322 STANDARD ERROR OF THE REGRESSION: 0.2644 NORMALIZED: 0.3954 Percent Changes, Light Rail Cost Index -- Total, (LR) Solid Line, PPI Shaded Line Light Rail Cost Index -- Total, (LR) Level Tests, Interval Q, 85:1 to 94:2 CORRELATION VECTOR ------------------ DATED QUARTERLY(1985:1 TO 1994:2) (0) 0) #LR 1.000 1) #PPI 0.961 ORDINARY LEAST SQUARES ---------------------- QUARTERLY(1985:1 TO 1994:2) 38 OBSERVATIONS DEPENDENT VARIABLE: #LR COEFFICIENT STD. ERROR T-STAT INDEPENDENT VARIABLE -0.124894 0.06105 -2.046 CONSTANT 1) 1.17801 0.05668 20.78 #PPI R-BAR SQUARED: 0.9209 DURBIN-WATSON STATISTIC: 0.3546 STANDARD ERROR OF THE REGRESSION: 0.02387 NORMALIZED: 0.02091 Levels, Light Rail Cost Index -- Total, (#LR) Solid Line, PPI Shaded Line
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