European shares rise on bid activity, higher energy stocks
* Stocks rise in volatile trade after Monday's fall
* USG People surges after Japanese takeover offer
* Finland's Innofactor also rises on merger plan
* Oil prices show signs of stabilising (Adds details, shares)
By Sudip Kar-Gupta and Danilo Masoni
LONDON/MILAN, Dec 22 (Reuters) - European shares edged higher on Tuesday, helped by firmer energy stocks and takeover activity, recovering some ground following a pullback in the previous session prompted by worries over a post-election political stalemate in Spain.
Trading was volatile as the holiday season approached and some investors were cautious over prospects for next year.
The pan-European FTSEurofirst 300 index, which had fallen 1.2 percent on Monday, rose 0.3 percent by 1111 GMT, while the euro zone's blue-chip Euro STOXX 50 index was up 0.1 percent.
"There are no easy gains to make," said Marco Vailati, head of research and investment at Italy's Cassa Lombarda. Continuación...