Major oil companies won't participate in California gas price spike hearing 
The California Energy Commission will hold a hearing on Tuesday on gas price spikes, but major oil companies operating in California have rejected invitations to participate, according to documents provided by the commission.
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### Instruction: Major oil companies won't participate in California gas price spike hearing 

### Response: The California Energy Commission will hold a hearing on Tuesday on gas price spikes, but major oil companies operating in California have rejected invitations to participate, according to documents provided by the commission.