Sources of inequality in the cost of transport mobility in the city of Yaoundé, Cameroon

Figures & data

Table 1: Descriptive statistics obtained from the Urban Displacement Plan

Variable	Mean	Standard deviation	Minimum	Maximum
Cost of mobility for respondent (log)	10.131	0.7967	6.7720	12.481
Travels to work using a mode of transportation (1 = yes and 0 = otherwise)	0.4091	0.4916	0	1
Average distance covered by respondent (km)	0.1488	0.1132	0.035	2
Average time to reach destination (hours)	0.0918	0.0302	0.055	0.1428
Average cost of fuel (FCFA)	133.27	36.427	113.67	511.06
Average transport fare (FCFA)	147.3	228.8	0	7000
Uses a motorcycle to travel (1 = yes and 0 = otherwise)	0.0288	0.1672	0	1
Uses a taxi to travel (1 = yes and 0 = otherwise)	0.5575	0.4966	0	1
Uses a minibus or bus to travel (1 = yes and 0 = otherwise)	0.0636	0.2441	0	1
Urban city centre (1 = yes and 0 = otherwise)	0.5324	0.4989	0	1

Source: Computed by the authors from the 2010 Urban Displacement Plan and complementary statistics using Stata 10.

Table 2: Weighted determinants of the cost of mobility in Yaoundé

Variable	Estimate (t statistic)
Travels to work using a mode of transportation (1 = yes and 0 = otherwise)	0.0178*
	(1.69)
Average distance covered by respondent (km)	0.3323***
	(7.77)
Average time to reach destination (hours)	1.4176***
	(8.37)
Average cost of fuel (FCFA)	0.0057***
	(43.78)
Average transport fare (FCFA)	–0.0003***
	(–13.40)
Uses a motorcycle to travel (1 = yes and 0 = otherwise)	–2.3963***
	(–80.28)
Uses a taxi to travel (1 = yes and 0 = otherwise)	0.1971***
	(18.41)
Uses a minibus or bus to travel (1 = yes and 0 = otherwise)	0.6283***
	(28.29)
Urban city centre (1 = yes and 0 = otherwise)	0.0540***
	(5.37)
R-squared/adjusted R-squared	0.4154/0.4151
Fisher test [p value]	1 278.8 [0.000]

Notes: ***, ** and * respectively represent the 1%, 5% and 10% levels of significance. Variables in parentheses are the Student's t distribution.

Source: Computed by authors from the 2010 Urban Displacement Plan and complementary statistics using Stata 10.

Table 3: Decomposition of inequality in the cost of transport mobility by sources

Source of mobility	Gini value
Travels to work using a mode of transportation (1 = yes and 0 = otherwise)	0.001 (0.001)
Average distance covered by respondent (km)	0.005 (0.010)
Average time to reach destination (hours)	0.005 (0.010)
Average cost of fuel (FCFA)	0.045 (0.089)
Average transport fare (FCFA)	0.004 (0.008)
Uses a motorcycle to travel (1 = yes and 0 = otherwise)	0.179 (0.353)
Uses a taxi to travel (1 = yes and 0 = otherwise)	0.017 (0.033)
Uses a minibus or bus to travel (1 = yes and 0 = otherwise)	0.011 (0.023)
Urban city centre (1 = yes and 0 = otherwise)	0.002 (0.004)
Residual	0.237 (0.468)
Total inequality	0.507 (1.000)

Note: Values in parentheses are relative contributions.

Source: Computed by authors from the 2010 Urban Displacement Plan and complementary statistics using DASP 2.1 and Stata 10.

Table 4: Marginal contributions of the various estimated sources of the cost of transport mobility

Estimated sources of the cost of mobility	Level 1	Level 2	Level 3	Level 4	Level 5	Level 6	Level 7	Level 8	Level 9	Level 10
Travels to work using a mode of transportation (1 = yes and 0 = otherwise)	0.0004	0.0002	0.0001	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000
Average distance covered by respondent (km)	0.0015	0.0009	0.0006	0.0004	0.0003	0.0003	0.0002	0.0002	0.0001	0.0001
Average time to reach destination (hours)	0.0022	0.0013	0.0008	0.0005	0.0003	0.0002	0.0001	0.0001	0.0000	–0.0000
Average cost of fuel (FCFA)	0.0085	0.0069	0.0057	0.0049	0.0043	0.0038	0.0033	0.0029	0.0026	0.0023
Average transport fare (FCFA)	0.0021	0.0010	0.0006	0.0003	0.0001	0.0000	–0.0000	–0.0000	–0.0000	–0.0000
Uses a motorcycle to travel (1 = yes and 0 = otherwise)	0.0220	0.0208	0.0198	0.0189	0.0181	0.0173	0.0166	0.0158	0.0153	0.0145
Uses a taxi to travel (1 = yes and 0 = otherwise)	0.0048	0.0034	0.0025	0.0019	0.0014	0.0010	0.0007	0.0004	0.0003	0.0001
Uses a minibus or bus to travel (1 = yes and 0 = otherwise)	0.0022	0.0019	0.0016	0.0013	0.0011	0.0010	0.0008	0.0007	0.0006	0.0005
Urban city centre (1 = yes and 0 = otherwise)	0.0013	0.0007	0.0003	0.0001	0.0000	–0.0001	–0.0001	–0.0001	–0.0001	–0.0001
Residual	0.0066	0.0048	0.0036	0.0028	0.0022	0.0017	0.0013	0.0011	0.0008	0.0007

Notes: Levels indicate the point of entry of an estimated source into a combination of sources. Results are reported to four decimal places.

Source: Computed by authors using DASP 2.1 distributive software in Stata 10.