Lederman, Daniel (contributor); … - 2007
they are affiliated.
∗∗
Development Research Group, The World Bank, 1818 H Street, NW, Washington DC 20433, USA.
Email …
X
are total exports of country c, is world trade in sector s, and
w
s
X
w
X is total world trade.
4
and 1 … and superscripts are defined in the same way as in the case of exports.
c
ts
X
,
c
ts
X
,−
c
ts
X
−
,
c
ts
X
,
c
ts
X …