CREATE TABLE match (match_id DECIMAL, date TEXT, venue TEXT, score TEXT, result TEXT, competition TEXT)
CREATE TABLE city (city_id DECIMAL, city TEXT, hanzi TEXT, hanyu_pinyin TEXT, regional_population DECIMAL, gdp DECIMAL)
CREATE TABLE temperature (city_id DECIMAL, jan DECIMAL, feb DECIMAL, mar DECIMAL, apr DECIMAL, jun DECIMAL, jul DECIMAL, aug DECIMAL, sep DECIMAL, oct DECIMAL, nov DECIMAL, dec DECIMAL)
CREATE TABLE hosting_city (year DECIMAL, match_id DECIMAL, host_city TEXT)

What are the GDP and population of the city that already served as a host more than once?
SELECT t1.gdp, t1.regional_population FROM city AS T1 JOIN hosting_city AS T2 ON T1.city_id = T2.host_city GROUP BY t2.host_city HAVING COUNT(*) > 1
SELECT "t1"."gdp", "t1"."regional_population" FROM "city" AS "T1" JOIN "hosting_city" AS "T2" ON "T1"."city_id" = "T2"."host_city" GROUP BY "t2"."host_city" HAVING COUNT(*) > 1