A Survival Analysis on Fuel Cell Technology Patent Maintenance and Values Exploration between 1976 and 2001

Table 2

Analysis of the variance results for the market-to-book-ratio on self-citing and other-cited citations.

Source	Partial SS	Df	MS		Prob >
Model	111.55	3	37.18	4.16	0.0092
Self-citing	3.85	1	3.85	0.43	0.5137
Other-cited	59.38	1	59.38	6.64	0.0122
Interaction	28.44	1	28.44	3.18	0.0791
Residual	590.02	66	8.94
Total	701.57	69	10.17

Note: represents < 0.1, represents < 0.05, and represents 0.01.