Announcement 120
The geography of British exports 121 – 136
A G Hoare
Measuring the external effects of public programs 137 – 147
M Dear, R Fincher, L Currie
Office location and the cost of maintaining contact 149 – 168
R Pye
Optimal zoning systems for spatial interaction models 169 – 184
S Openshaw
The small-world problem in a spatial context 185 – 195
A K M Stoneham
The stability of regional input - output multipliers 197 – 214
R S Conway Jr
Algorithm 1: Three-point rational function interpolation for calibrating gravity models 215 – 221
Notes for authors on the preparation and description of computer algorithms 223 – 228
Letters to the editor 229 – 234
D A Hensher, A Sayer, I Cullen
Reviews 235 – 244
