San Rafael, Calif.-based LucasArts Entertainment Co. and...

San Rafael, Calif.-based LucasArts Entertainment Co. and Mattel Toys, El Segundo, announced a joint worldwide venture to create and design innovative toys to be marketed by Mattel under the trademark of LucasToys . . . Pasadena-based Jacobs Engineering Group Inc. has approved a 2-for-1 stock split, payable May 28, to shareholders of record on May 6 . . . Argonaut Group Inc., of Los Angeles declared a 3-for-1 stock split, payable June 4 to shareholders of record May 7. The company also increased the quarterly cash dividend to 17 cents per share on post-split basis, payable May 21 to shareholders of record May 6 . . . The Investment Company Institute reported that the assets of the nation’s 544 money market mutual funds fell $901.3 million in the week ended April 24a to $469.87 billion.