List of documents authored or co-authored by K. VAIDYA A PRACTICAL METHODOLOGY FOR IDENTIFYING POOR AND NON-POOR TRAVELLERS IN ROADSIDE SURVEYS AND DEFINING POVERTY THRESHOLDS 101 THINGS THAT CAN GO WRONG IN AN ECONOMIC APPRAISAL OF RURAL ROADS IN DEVELOPING COUNTRIES THE EVALUATION OF TRAVEL TIME SAVINGS IN LEAST DEVELOPED COUNTRIES: THEORETICAL AND EMPIRICAL CHALLENGES AND RESULTS FROM A FIELD STUDY