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Table 3 Descriptive statistics of explanatory variables

From: Determinants of urban public transport efficiency: case study of the Czech Republic

Variable

Unit

Description

Min

Max

Mean

St. dev.

Price

CZK

Price of average single ticket

2.3

9.7

4.3

1.6

Drivers_share

%

Proportion of drivers in total employees

0.4

0.7

0.5

0.08

Avr_old

years

Average age of rolling stock

3.1

14.4

8.3

2.2

Is_tram

binary

Presence of tramway in the system

0

1

0.4

0.5

Subs_rev

%

Proportion of subsidies in revenues

0.9

2.8

1.5

0.5

Popul_density

thousands of inhabitants/km2

Population density

0.26

2.56

1.12

0.57

Net_density

km/km2

Line length divided by area

1.2

24.7

4.6

4.9

Doublecity

Binary

Two-city system

0

1

0.21

0.41

VKM_tot

millions

Total VKM

0.47

115

14.0

25.0

Bottleneck

Binary

Presence of public transport bottleneck

0

1

0.05

0.22

Subs_cost

%

Proportion of subsidies in costs

0.32

0.68

0.52

0.09

Inv_rate

%

Proportion of investment in costs

0

0.95

0.18

0.21

Avr_inv

CZK thousands

Average company investment

0.02

2958.5

55.9

653

Vehicle_lines

vehicles

Number of vehicles per km of line

0.15

1.32

0.45

0.27

Party_right

Binary

City hall leadership is a right-wing party

0

1

0.38

0.49