Table 7.
Estimated Relationships (ak) between Negatively Reviewed Fuel-Saving Technologies and Negatively Reviewed Operational Characteristics, Pooled MY 2014 and 2015 Data
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Negative Steering Feel | Negative Cornering Ability | Negative General Drivability | Negative General Handling | Negative Acceleration Feel | Negative Acceleration Capability | Negative General Acceleration | Negative Brake Feel | Negative Stopping Ability | Negative General Braking | Negative Tire-Road Noise | |
| Active Air Dam | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Active Grille Shutters | −0.06 | 0.05 | 0.14 | −0.04 | −0.12 | −0.01 | −0.05 | 0.16*** | −0.02 | 0.05** | 0.11* |
| Active Ride Height | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Low Resistance Tires | 0.12 | 0.33 | 0.41** | 0.21 | 0.17 | 0.05 | 0.14 | −0.05 | −0.04 | −0.08 | −0.06 |
| Electronic Power Steering | 0.80*** | 0.14** | 0.10** | 0.04 | 0.02 | 0.03 | −0.03* | 0.03 | 0.05 | 0.01 | 0.04 |
| Turbocharged | 0.12** | 0.13** | 0.15** | −0.01 | 0.27*** | 0.34*** | 0.03 | 0.01 | 0.03 | −0.00 | 0.03 |
| GDI | 0.14 | −0.08** | −0.14** | −0.16*** | 0.16 | 0.14 | −0.03 | −0.02 | −0.08** | −0.01 | 0.10 |
| Cylinder Deactivation | 0.18 | 0.11 | 0.15 | 0.38* | −0.02 | −0.15* | −0.09** | −0.19*** | −0.06 | −0.00 | 0.18 |
| Diesel | −0.09 | −0.01 | 0.04 | 0.08 | 0.09 | 0.45*** | 0.27** | −0.03 | 0.07 | −0.01 | −0.07 |
| Hybrid | 0.02 | −0.00 | 0.17 | 0.02 | 0.07 | 0.22** | 0.05 | 0.11 | −0.01 | 0.05 | −0.02 |
| Plug-In Hybrid Electric | 0.06 | 0.03 | −0.13 | 0.01 | 0.05 | −0.04 | 0.03 | −0.22 | 0.15 | −0.03 | −0.00 |
| Full Electric | 0.47 | −0.06 | −0.10 | 0.02 | 0.51 | 0.37 | 0.52* | 0.48 | −0.12 | −0.05 | 0.01 |
| Stop-Start | 0.05 | −0.11** | 0.10* | 0.06 | 0.12 | −0.04 | −0.01 | −0.02 | 0.08 | 0.03 | 0.14* |
| High Speed Automatic | 0.10*** | 0.08** | 0.07** | 0.09*** | 0.19*** | 0.15*** | 0.03* | 0.06** | 0.02 | 0.00 | 0.03 |
| CVT | 0.05 | 0.05 | 0.17** | 0.17*** | 0.14** | 0.33*** | 0.03 | −0.00 | 0.00 | −0.04* | 0.05 |
| DCT | −0.03 | 0.12 | 0.24*** | 0.07 | 0.15** | 0.02 | 0.04 | 0.08 | 0.08 | 0.00 | 0.09 |
| Elec Assist / Low Drag Brakes | −0.16 | 0.01 | −0.15* | −0.02 | 0.99*** | 0.90*** | 0.02 | 0.02 | −0.05 | −0.01 | 0.03 |
| Lighting-LED | −0.13 | −0.17** | −0.25*** | −0.28*** | −0.06 | −0.10 | 0.01 | −0.08 | −0.13 | 0.01 | −0.27*** |
| Mass Reduction | 0.76*** | 0.19 | −0.13 | 0.65** | 0.03 | −0.37*** | 0.01 | −0.11** | −0.07 | 0.01 | −0.04 |
| Passive Aerodynamics | 0.01 | −0.06 | −0.08 | 0.31 | 0.39** | 0.31* | 0.34* | −0.18*** | −0.04 | −0.05 | 0.08 |
| Fuel Cell | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Negative Wind Noise | Negative Interior Noise | Negative Powertrain Noise | Negative General Noise | Negative Chassis Vibration | Negative Powertrain Vibration | Negative General Vibration | Negative Ride Comfort | Negative Fuel Economy | Negative Range | Negative Charging | |||||||||||
| Active Air Dam | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | ||||||||||
| Active Grille Shutters | 0.01 | −0.00 | −0.02 | 0.03 | −0.01 | 0.02 | −0.04 | −0.06 | −0.11 | 0.00 | 0.00 | ||||||||||
| Active Ride Height | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | ||||||||||
| Low Resistance Tires | 0.04 | −0.02 | 0.14 | 0.18 | −0.02 | −0.08 | 0.09 | 0.35* | −0.03 | −0.01 | −0.01 | ||||||||||
| Electronic Power Steering | 0.01 | −0.01 | −0.03 | 0.07* | 0.02 | −0.01 | −0.01 | −0.00 | 0.02 | 0.01 | 0.00 | ||||||||||
| Turbocharged | −0.02 | −0.02 | 0.15*** | 0.01 | 0.02 | 0.03 | −0.00 | −0.01 | 0.16** | 0.00 | 0.00* | ||||||||||
| GDI | −0.00 | −0.04** | 0.19 | 0.00 | 0.00 | −0.01 | 0.21* | −0.04 | 0.02 | −0.01 | −0.00 | ||||||||||
| Cylinder Deactivation | 0.02 | 0.01 | 0.30 | 0.04 | 0.02 | 0.00 | −0.05 | −0.03 | 0.26 | 0.01 | −0.00 | ||||||||||
| Diesel | −0.06 | −0.03 | 0.29** | −0.04 | −0.00 | −0.03* | 0.02 | −0.03 | 0.18 | −0.00 | −0.01 | ||||||||||
| Hybrid | 0.01 | −0.04 | 0.13 | 0.03 | 0.00 | 0.00 | −0.00 | 0.06 | 0.15 | 0.01 | −0.00 | ||||||||||
| Plug-In Hybrid Electric | −0.02 | 0.01 | 0.25 | −0.06 | 0.01 | 0.01 | 0.14 | 0.01 | 0.16 | −0.27*** | 0.08 | ||||||||||
| Full Electric | 0.05 | 0.04 | 0.26 | 0.65** | −0.02 | −0.01 | −0.06 | 0.01 | −0.05 | 1.00*** | −0.06 | ||||||||||
| Stop-Start | 0.06 | −0.01 | −0.02 | 0.05 | −0.00 | −0.01 | 0.04 | 0.20** | 0.05 | −0.02 | 0.00 | ||||||||||
| High Speed Automatic | 0.02 | 0.03* | 0.07** | −0.00 | −0.01* | 0.02* | −0.00 | 0.13*** | 0.12*** | 0.00 | −0.00 | ||||||||||
| CVT | 0.10** | 0.01 | 0.26*** | 0.06 | 0.01 | 0.01 | 0.03 | 0.15** | 0.14** | 0.00 | −0.00 | ||||||||||
| DCT | −0.00 | 0.08 | −0.02 | 0.04 | −0.01 | 0.03 | 0.07 | 0.20** | −0.01 | 0.00 | −0.00 | ||||||||||
| Elec Assist / Low Drag Brakes | −0.06 | −0.01 | −0.07 | 0.04 | 0.05* | 0.02 | 0.02 | 0.03 | 0.21** | −0.12 | −0.07 | ||||||||||
| Lighting-LED | −0.06 | −0.07 | −0.06 | 0.81*** | 0.03** | 0.01 | 0.01 | −0.46*** | 0.07 | 0.02 | 0.00 | ||||||||||
| Mass Reduction | −0.00 | −0.00 | 0.50 | 0.31 | −0.01 | −0.02 | −0.01 | 0.45 | 0.11 | −0.01 | −0.00 | ||||||||||
| Passive Aerodynamics | 0.24 | 0.13 | 0.01 | 0.01 | 0.01 | −0.02 | 0.01 | −0.10 | 0.38* | −0.00 | −0.01 | ||||||||||
| Fuel Cell | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | ||||||||||
Notes: Number in a cell indicates the estimated probability of negative rating for the column variable conditional on technology named in the row. Number in bold means the significant result holds when we use the maximum of robust standard errors and conventional standard errors as the measure of efficiency, instead of using robust standard errors. For all columns, the sample size is 2,238. For each column, the linear probability model regresses the column variable on all technologies that were negatively reviewed and a set of fixed effects, including year, website, vehicle class, vehicle make, website-by-year, class-by-year, and make-by-year. Asterisks indicate the level of statistical significance: 10% (*), 5% (**), and 1% (***) levels.