This Week’s Datebook

The following is a roundup of key economic events.

Today:

* Commerce Department reports on construction spending for November.

* Treasury bill auction.

* U.S. automakers announce their sales for December.

* Beginning of trial of Adelphia Communications Corp. founder John Rigas and others on conspiracy and fraud charges.

* Walgreen Co. reports earnings.

Tuesday:

* Commerce Department reports on factory orders for November.

* ISM service index for December.

* Securities and Exchange Commission Chairman William H. Donaldson addresses a meeting in Washington of mutual fund directors.

* Apple’s Macworld convention opens in San Francisco.

* Enron Corp. will present its reorganization plan to a U.S. Bankruptcy Court judge for preliminary approval. It would allow Enron to start negotiating payment of some claims.

Thursday:

* Consumer Electronics Show opens in Las Vegas. Speakers include Microsoft Corp. Chairman Bill Gates, Hewlett-Packard Co. Chairman Carly Fiorina and Sprint Corp. Chairman Gary Forsee.

* Alcoa Inc. to report earnings.

* International Council of Shopping Centers releases monthly U.S. retail chain store sales index.

* Labor Department reports on weekly unemployment claims.

* Federal Reserve reports on consumer credit for November.

* Freddie Mac, the mortgage company, reports on mortgage rates.

Friday:

* Labor Department reports on employment for December.

* California reports on employment in the state.

Saturday:

* Public opening of the North American International Auto Show in Detroit. Closes Jan. 19.